Building a dinosaur from a chicken | Jack Horner

1,244,072 views ・ 2011-06-07

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Prevoditelj: Senzos Osijek Recezent: Tilen Pigac - EFZG
00:15
When I was growing up in Montana,
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Dok sam odrastao u Montani,
00:19
I had two dreams.
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imao sam dva sna.
00:22
I wanted to be a paleontologist,
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Želio sam biti paleontolog,
00:24
a dinosaur paleontologist,
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paleontolog za dinaosaure
00:26
and I wanted to have a pet dinosaur.
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i želio sam imati dinosaura kao kućnog ljubimca.
00:29
And so that's what I've been striving for
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I to je ono za čime sam težio
00:32
all of my life.
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cijeli svoj život.
00:35
I was very fortunate
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Bio sam veoma uspješan
00:37
early in my career.
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u svojoj ranoj karijeri.
00:39
I was fortunate
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Imao sam sreće
00:41
in finding things.
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u pronalaženju stvari.
00:43
I wasn't very good at reading things.
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Nisam bio dobar u čitanju stvari.
00:45
In fact, I don't read much of anything.
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Ustvari, gotovo ništa ne čitam.
00:48
I am extremely dyslexic,
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Iznimno sam disleksičan
00:50
and so reading is the hardest thing I do.
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pa mi je čitanje najteža stvar koju radim.
00:53
But instead, I go out and I find things.
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Ali umjesto toga, odem van i pronađem stvari.
00:56
Then I just pick things up.
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Zatim samo pokupim stvari.
00:58
I basically practice for finding money on the street.
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Gotovo sam ispraksiran za pronalaženje novca na ulici.
01:01
(Laughter)
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(Smijeh)
01:03
And I wander about the hills,
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I lutam brdima.
01:05
and I have found a few things.
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I pronašao sam par stvari.
01:08
And I have been fortunate enough
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I bio sam dovoljno sretan
01:11
to find things like the first eggs in the Western hemisphere
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da pronađem stvari poput prvih jaja na zapadnoj hemisferi
01:16
and the first baby dinosaurs in nests,
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i prve bebe dinosaura u gnijezdima,
01:20
the first dinosaur embryos
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prve embrije dinosaura
01:22
and massive accumulations of bones.
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i masivne akumulacije kosti.
01:26
And it happened to be at a time
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I to se dogodilo baš u vrijeme
01:28
when people were just starting to begin to realize
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kada su ljudi počeli shvaćati
01:32
that dinosaurs weren't the big, stupid, green reptiles
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da dinosauri nisu bili veliki, glupi, zeleni reptili
01:36
that people had thought for so many years.
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kao što su ljudi mislili mnogo godina.
01:39
People were starting to get an idea
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Ljudi su počeli shvaćati
01:41
that dinosaurs were special.
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da su dinosauri bili posebni.
01:43
And so, at that time,
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I tako sam u to vrijeme
01:46
I was able to make some interesting hypotheses
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bio u mogućnosti sastaviti nekoliko zanimljivih hipoteza
01:49
along with my colleagues.
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sa svojim kolegama.
01:51
We were able to actually say
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Bili smo u mogućnosti reći
01:53
that dinosaurs -- based on the evidence we had --
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da su dinosauri -- na temelju dokaza koje smo imali --
01:56
that dinosaurs built nests
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da su dinosauri radili skrovišta
01:59
and lived in colonies
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i živjeli u kolonijama
02:02
and cared for their young,
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i brinuli se za svoju mladunčad,
02:04
brought food to their babies
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nosili hranu bebama
02:06
and traveled in gigantic herds.
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i putovali u golemim krdima.
02:09
So it was pretty interesting stuff.
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Bile su to prilično zanimljive stvari.
02:12
I have gone on to find more things
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Otišao sam potražiti još stvari
02:15
and discover that dinosaurs really were very social.
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i otkrio da su dinosauri bili vrlo društveni.
02:19
We have found a lot of evidence
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Pronašli smo mnogo dokaza
02:22
that dinosaurs changed
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da su se dinosauri promijenili
02:24
from when they were juveniles to when they were adults.
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otkad su bili mladi do toga kad su postali odrasli.
02:26
The appearance of them would have been different --
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Izgled bi im bio drugačiji --
02:29
which it is in all social animals.
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kao što i je kod svih društvenih životinja.
02:31
In social groups of animals,
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U socijalnim grupama životinja,
02:33
the juveniles always look different than the adults.
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mladi uvijek izgledaju drugačije od odraslih.
02:36
The adults can recognize the juveniles;
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Odrasli mogu prepoznati mlade,
02:38
the juveniles can recognize the adults.
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mladi mogu prepoznati odrasle.
02:40
And so we're making a better picture
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I tako imamo bolju sliku .
02:43
of what a dinosaur looks like.
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toga kako su dinosauri izgledali.
02:45
And they didn't just all chase Jeeps around.
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I nisu svi samo ganjali džipove nakolo.
02:48
(Laughter)
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(Smijeh)
02:50
But it is that social thing
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Ali ta je socijalna stvar
02:53
that I guess attracted Michael Crichton.
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pretpostavljam privukla Michaela Crichtona.
02:57
And in his book, he talked about the social animals.
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U svojoj knjizi, on govori o društvenim životinjama.
03:01
And then Steven Spielberg, of course,
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I zatim Steven Spielberg, naravno,
03:03
depicts these dinosaurs
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prikazuje te dinosaure
03:05
as being very social creatures.
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kao veoma socijalna bića.
03:08
The theme of this story is building a dinosaur,
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Tema ove priče je stvaranje dinosaura
03:10
and so we come to that part of "Jurassic Park."
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i tu dolazimo do dijela “Jurskog parka”.
03:14
Michael Crichton really was one of the first people
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Michael Crichton je zaista bio jedan od prvih ljudi
03:17
to talk about bringing dinosaurs back to life.
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koji je govorio o oživljavanju dinosaura.
03:21
You all know the story, right.
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Svi znate priču, zar ne?
03:23
I mean, I assume everyone here has seen "Jurassic Park."
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Hoću reći, pretpostavljam da ste svi ovdje gledali “Jurski park".
03:26
If you want to make a dinosaur,
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Ako želite napraviti dinosaura,
03:28
you go out, you find yourself a piece of petrified tree sap --
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izađete van, nađete si komad biljnog soka okamenjenog drveta --
03:32
otherwise known as amber --
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poznatiji kao jantar --
03:34
that has some blood-sucking insects in it,
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koji u sebi ima insekte koji piju krv,
03:37
good ones,
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one dobre
03:39
and you get your insect and you drill into it
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i dobijete svog insekta, izbušite ga
03:42
and you suck out some DNA,
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i izvučete nešto DNK,
03:44
because obviously all insects that sucked blood in those days
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zato što su očito svi insekti koji su pili krv u tim danima,
03:47
sucked dinosaur DNA out.
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usisali i dinosaursku DNK.
03:50
And you take your DNA back to the laboratory
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I uzmete DNK u laboratorij
03:53
and you clone it.
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te ga klonirate.
03:56
And I guess you inject it into maybe an ostrich egg,
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I pretpostavljam da ga ubrizgate u nojevo jaje
03:59
or something like that,
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ili tako nešto.
04:01
and then you wait,
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I nakon toga čekate,
04:03
and, lo and behold, out pops a little baby dinosaur.
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gledate i promatrate, a van iskoči mala beba dinosaura.
04:06
And everybody's happy about that.
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I svi su sretni zbog toga.
04:09
(Laughter)
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(Smijeh)
04:12
And they're happy over and over again.
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I oni su sretni i sretni i sretni.
04:14
They keep doing it; they just keep making these things.
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Nastavljaju to raditi; jednostavno izmišljaju te stvari.
04:17
And then, then, then, and then ...
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I onda, i onda, i onda i onda ...
04:21
Then the dinosaurs, being social,
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Onda dinosauri, koji su socijalni,
04:24
act out their socialness,
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pokazuju tu svoju društvenost.
04:27
and they get together,
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I druže se
04:29
and they conspire.
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i kuju zavjere.
04:32
And, of course, that's what makes Steven Spielberg's movie --
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I naravno, to je ono što čini film Stevena Spielberga --
04:36
conspiring dinosaurs chasing people around.
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dinosauri koji kuju zavjere jure ljude naokolo.
04:39
So I assume everybody knows
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Pretpostavljam da svi znaju
04:41
that if you actually had a piece of amber and it had an insect in it,
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da kada bi zaista imali komadić jantara u kojem bi unutra bio insekt
04:44
and you drilled into it,
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i kad bi ga izbušili
04:47
and you got something out of that insect,
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i izvadili nešto iz tog insekta
04:49
and you cloned it, and you did it over and over and over again,
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i klonirali i kad bi to učinili mnogo puta,
04:52
you'd have a room full of mosquitos.
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imali bi sobu punu komaraca.
04:54
(Laughter)
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(Smijeh)
04:56
(Applause)
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(Pljesak)
05:01
And probably a whole bunch of trees as well.
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I vrlo vjerojatno hrpu stabala.
05:04
Now if you want dinosaur DNA,
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A sada, ako želite DNK dinosaura,
05:06
I say go to the dinosaur.
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predlažem da odete do dinosaura.
05:09
So that's what we've done.
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I to je ono što sam učinio.
05:11
Back in 1993 when the movie came out,
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1993. godine kada je film izašao
05:13
we actually had a grant from the National Science Foundation
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dobili smo odobrenje od Fundacije Nacionalne Znanosti
05:16
to attempt to extract DNA from a dinosaur,
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da pokušamo izvaditi DNK iz dinosaura.
05:19
and we chose the dinosaur on the left,
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Izabrali smo dinosaura s lijeve strane,
05:22
a Tyrannosaurus rex, which was a very nice specimen.
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Tyrannosaurusa Rexa, koji je bio veoma lijep primjerak.
05:25
And one of my former doctoral students,
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Jedna od mojih bivših doktorskih studenata,
05:27
Dr. Mary Schweitzer,
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Dr. Mary Schweitzer
05:29
actually had the background
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je zapravo imala pozadinu
05:31
to do this sort of thing.
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za rad s ovakvim stvarima.
05:33
And so she looked into the bone of this T. rex,
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Pa je pogledala u kost ovog T-rexa,
05:36
one of the thigh bones,
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jednu od bedrenih kosti,
05:38
and she actually found
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i zapravo je pronašla
05:40
some very interesting structures in there.
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neke veoma zanimljive strukture unutra.
05:43
They found these red circular-looking objects,
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Pronašli su te crvene stvari koje izgledaju kao krug.
05:47
and they looked, for all the world,
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Izgledale su
05:49
like red blood cells.
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kao crvene krvne stanice.
05:51
And they're in
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I nalaze se u
05:53
what appear to be the blood channels
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nečemu što se čini da su krvni kanali
05:55
that go through the bone.
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koji idu kroz kost.
05:57
And so she thought, well, what the heck.
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Pa je pomislila, zašto ne?
06:00
So she sampled some material out of it.
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Pa je uzorkovala nešto materijala iz toga.
06:03
Now it wasn't DNA; she didn't find DNA.
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To nije bila DNK; nije pronašla DNK.
06:06
But she did find heme,
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Ali je pronašla hem
06:09
which is the biological foundation
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koji je biološka osnova
06:11
of hemoglobin.
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hemoglobina.
06:13
And that was really cool.
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I to je bilo zaista sjajno.
06:15
That was interesting.
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To je bilo zanimljivo.
06:17
That was -- here we have 65-million-year-old heme.
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To je bio -- ovdje imamo 65 milijuna godina star hem.
06:22
Well we tried and tried
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Pa smo pokušavali i pokušavali
06:24
and we couldn't really get anything else out of it.
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no nismo mogli dobiti ništa drugo iz toga.
06:26
So a few years went by,
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Tako je prošlo nekoliko godina
06:28
and then we started the Hell Creek Project.
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dok nismo započeli projekt Hell Creek.
06:30
And the Hell Creek Project was this massive undertaking
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Projekt Hell Creek je bio masivno poduzimanje
06:33
to get as many dinosaurs as we could possibly find,
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da bi dobili što više dinosaura koje smo mogli naći
06:36
and hopefully find some dinosaurs
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i nadali smo se da ćemo naći neke dinosaure
06:38
that had more material in them.
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koji su imali više materijala u sebi.
06:41
And out in eastern Montana
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Vani, u istočnoj Montani
06:44
there's a lot of space, a lot of badlands,
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ima mnogo prostora, mnogo pustinjskih predjela,
06:46
and not very many people,
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a nema mnogo ljudi.
06:48
and so you can go out there and find a lot of stuff.
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Odete tamo i nađete puno toga.
06:50
And we did find a lot of stuff.
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I našli smo puno toga.
06:52
We found a lot of Tyrannosaurs,
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Pronašli smo mnogo Tyrannosaurusa,
06:54
but we found one special Tyrannosaur,
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ali smo pronašli i jednog posebnog Tyrannosaurusa
06:56
and we called it B-rex.
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i nazvali ga B-rex.
06:58
And B-rex was found
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B-rex je pronađen
07:00
under a thousand cubic yards of rock.
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ispod tisuću kubičnih metara kamenja.
07:02
It wasn't a very complete T. rex,
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To nije bio potpuni T - rex
07:05
and it wasn't a very big T. rex,
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i nije bio veoma veliki T - rex,
07:08
but it was a very special B-rex.
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ali je bio veoma poseban B-rex.
07:11
And I and my colleagues cut into it,
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Pa smo moje kolege i ja zarezali u njega
07:13
and we were able to determine,
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i bili smo u mogućnosti odrediti
07:15
by looking at lines of arrested growth, some lines in it,
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gledajući linije spriječenog rasta, neke linije unutar toga,
07:18
that B-rex had died at the age of 16.
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da je B-rex uginuo sa 16 godina.
07:21
We don't really know how long dinosaurs lived,
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Nismo znali koliko su dinosauri dugo živjeli,
07:24
because we haven't found the oldest one yet.
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zato što još nismo pronašli najstarijeg.
07:26
But this one died at the age of 16.
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Ali ovaj je uginuo sa 16 godina.
07:29
We gave samples to Mary Schweitzer,
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Dali smo uzorke Mary Schweitzer
07:31
and she was actually able to determine
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i ona je zapravo mogla odrediti
07:33
that B-rex was a female
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da je B-rex bio ženka
07:35
based on medullary tissue
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zbog moždanskog tkiva
07:37
found on the inside of the bone.
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koje je našla unutar kosti.
07:39
Medullary tissue is the calcium build-up,
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Moždansko tkivo je izgrađeno od kalcija,
07:42
the calcium storage basically,
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u osnovi je skladište kalcija,
07:44
when an animal is pregnant,
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kada je životinja trudna,
07:46
when a bird is pregnant.
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kada je ptica trudna.
07:48
So here was the character
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Ovdje je bio lik
07:50
that linked birds and dinosaurs.
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koji je povezivao ptice i dinosaure.
07:52
But Mary went further.
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Ali Mary je otišla dalje.
07:54
She took the bone, and she dumped it into acid.
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Uzela je kost i stavila ju u kiselinu.
07:57
Now we all know that bones are fossilized,
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Svi znamo da su te kosti fosilizirane
08:00
and so if you dump it into acid,
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i ako je bacite u kiselinu,
08:02
there shouldn't be anything left.
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ne bi trebalo ostati ništa.
08:04
But there was something left.
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Ali ovdje je nešto ostalo.
08:06
There were blood vessels left.
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Ostale su krvne žile.
08:09
There were flexible, clear blood vessels.
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Fleksibilne, čiste krvne žile.
08:13
And so here was the first soft tissue from a dinosaur.
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I ovdje je bilo prvo meko tkivo dinosaura.
08:16
It was extraordinary.
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Bilo je izvanredno.
08:18
But she also found osteocytes,
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Također je našla i osteocite,
08:21
which are the cells that laid down the bones.
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stanice od kojih su sačinjene kosti.
08:24
And try and try, we could not find DNA,
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Pokušaj za pokušajem, no nismo mogli pronaći DNK,
08:28
but she did find evidence of proteins.
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ali je pronašla dokaz proteina.
08:31
But we thought maybe --
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Mislili smo da možda --
08:34
well, we thought maybe
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pa mislili smo da se materijal možda
08:36
that the material was breaking down after it was coming out of the ground.
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raspao nakon što smo ga pokupili sa zemlje.
08:39
We thought maybe it was deteriorating very fast.
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Mislili smo da je možda veoma brzo propadao.
08:41
And so we built a laboratory
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Pa smo napravili laboratorij
08:43
in the back of an 18-wheeler trailer,
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na kamionu
08:46
and actually took the laboratory to the field
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i vozili laboratorij na polje
08:49
where we could get better samples.
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kako bismo dobili bolje uzorke.
08:51
And we did. We got better material.
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I jesmo. Dobili smo bolje uzorke.
08:54
The cells looked better.
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Stanice su izgledale bolje.
08:56
The vessels looked better.
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Žile su izgledale bolje.
08:58
Found the protein collagen.
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Zatim kolagen.
09:00
I mean, it was wonderful stuff.
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Mislim, bile su to fantastične stvari.
09:03
But it's not dinosaur DNA.
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Ali to nije DNK dinosaura.
09:07
So we have discovered
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Pa smo otkrili
09:09
that dinosaur DNA, and all DNA,
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da se DNK dinosaura, kao i sva DNK
09:11
just breaks down too fast.
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jednostavno prebrzo raspada.
09:13
We're just not going to be able
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Jednostavno nećemo moći
09:15
to do what they did in "Jurassic Park."
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učiniti ono što su oni učinili u “Jurskom parku”.
09:18
We're not going to be able to make a dinosaur
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Nećemo moći napraviti dinosaura
09:21
based on a dinosaur.
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na temelju dinosaura.
09:24
But birds are dinosaurs.
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Ali ptice su dinosauri.
09:29
Birds are living dinosaurs.
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Ptice su živi dinosauri.
09:32
We actually classify them
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Zapravo ih klasificiramo
09:34
as dinosaurs.
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kao dinosaure.
09:36
We now call them non-avian dinosaurs
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Sada ih zovemo ne-ptičji dinosauri
09:38
and avian dinosaurs.
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i ptičji dinosauri.
09:40
So the non-avian dinosaurs
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Ne-ptičji dinosauri
09:42
are the big clunky ones that went extinct.
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su oni veliki nezgrapni koji su izumrli.
09:44
Avian dinosaurs are our modern birds.
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Ptičji dinosauri su naše moderne ptice.
09:47
So we don't have to make a dinosaur
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Dakle, ne moramo napraviti dinosaura
09:49
because we already have them.
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jer ga već imamo.
09:54
(Laughter)
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(Smijeh)
09:58
I know, you're as bad as the sixth-graders.
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Znam da ste grozni poput klinaca iz šestog razreda.
10:02
(Laughter)
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(Smijeh)
10:04
The sixth-graders look at it and they say, "No."
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Klinci iz šestog razreda gledaju i govore, “Ne”.
10:07
(Laughter)
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(Smijeh)
10:09
"You can call it a dinosaur,
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“Možete to zvati dinosaurom,
10:11
but look at the velociraptor: the velociraptor is cool."
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ali pogledajte velociraptora: velociraptor je super”.
10:14
(Laughter)
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(Smijeh)
10:16
"The chicken is not."
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“Kokoš nije”.
10:18
(Laughter)
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(Smijeh)
10:20
So this is our problem,
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Dakle, to je naš problem,
10:22
as you can imagine.
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kao što možete zamisliti.
10:25
The chicken is a dinosaur.
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Pile je dinosaur.
10:27
I mean it really is.
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Hoću reći da zaista je.
10:29
You can't argue with it
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Ne možete se prepirati oko toga
10:31
because we're the classifiers and we've classified it that way.
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jer smo mi klasifikatori i tako smo to klasificirali.
10:34
(Laughter)
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(Smijeh)
10:36
(Applause)
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(Pljesak)
10:41
But the sixth-graders demand it.
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Ali klinci iz šestog razreda zahtijevaju.
10:43
"Fix the chicken."
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“Popravi kokoš”.
10:45
(Laughter)
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(Smijeh)
10:47
So that's what I'm here to tell you about:
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I ovdje sam da bih vam rekao:
10:49
how we are going to fix a chicken.
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kako ćemo popraviti kokoš.
10:52
So we have a number of ways
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Dakle, imamo brojne načine
10:55
that we actually can fix the chicken.
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na koje možemo popraviti kokoš.
11:00
Because evolution works,
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Jer evolucija stvarno djeluje,
11:02
we actually have some evolutionary tools.
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zaista imamo neke alate za evoluciju.
11:05
We'll call them biological modification tools.
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Zvat ćemo ih alatima biološke modifikacije.
11:08
We have selection.
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Imamo selekciju.
11:10
And we know selection works.
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I znamo kako selekcija uspijeva.
11:12
We started out with a wolf-like creature
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Počeli smo sa stvorenjima nalik na vukove
11:15
and we ended up with a Maltese.
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i završili s malteškim psima.
11:18
I mean, that's --
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Mislim, to je --
11:21
that's definitely genetic modification.
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to je definitivno genetska modifikacija.
11:25
Or any of the other funny-looking little dogs.
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Ili bilo koji drugi mali pas smiješnog izgleda.
11:30
We also have transgenesis.
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Također imamo i transgenezu.
11:32
Transgenesis is really cool too.
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Transgeneza je također super.
11:34
That's where you take a gene out of one animal and stick it in another one.
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Njome izvadite gen iz jedne životinje i ubacite ga u drugu.
11:37
That's how people make GloFish.
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Tako su ljudi napravili fluorescentnu ribu.
11:40
You take a glow gene
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Izvadite fluorescentni gen
11:43
out of a coral or a jellyfish
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iz koralja ili meduze
11:47
and you stick it in a zebrafish,
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i stavite ga u ribu zebricu
11:49
and, puff, they glow.
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i hopa -- one svijetle.
11:51
And that's pretty cool.
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I to je super.
11:53
And they obviously make a lot of money off of them.
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I očito su zaradili mnogo novaca na tome.
11:56
And now they're making Glow-rabbits
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Sada rade fluorescentne zečeve
11:58
and Glow-all-sorts-of-things.
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i fluoresciraju razne stvari.
12:00
I guess we could make a glow chicken.
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Pretpostavljam da bismo mogli napraviti fluorescentnu kokoš.
12:03
(Laughter)
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(Smijeh)
12:05
But I don't think that'll satisfy the sixth-graders either.
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Ali sumnjam da će to zadovoljiti šestaše.
12:08
But there's another thing.
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Ali postoji još jedna stvar.
12:10
There's what we call atavism activation.
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To zovemo aktivacijom atavizma.
12:13
And atavism activation
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Aktivacija atavizma
12:15
is basically --
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je u principu --
12:17
an atavism is an ancestral characteristic.
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atavizam je nasljedna karakteristika.
12:21
You heard
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Čuli ste
12:23
that occasionally children are born with tails,
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da su ponekad djeca rođena s repovima
12:26
and it's because it's an ancestral characteristic.
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i to je zato što je to nasljedna osobina.
12:30
And so there are a number of atavisms
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Tako dakle postoje brojni atavizmi
12:33
that can happen.
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koji se mogu dogoditi.
12:35
Snakes are occasionally born with legs.
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Zmije se ponekad izlegu s nogama.
12:38
And here's an example.
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I ovdje imamo jedan primjer.
12:40
This is a chicken with teeth.
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Ovo je pile sa zubima.
12:43
A fellow by the name of Matthew Harris
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Kolega imenom Mattew Harris
12:45
at the University of Wisconsin in Madison
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s Fakulteta Winsconsin u Madisonu
12:48
actually figured out a way to stimulate
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je zapravo shvatio način na koji se može potaknuti
12:51
the gene for teeth,
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gen za zube
12:54
and so was able to actually turn the tooth gene on
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pa je u principu bio u mogućnosti „upaliti“ gen za zube
12:57
and produce teeth in chickens.
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i stvoriti zube kod kokoši.
13:00
Now that's a good characteristic.
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To je dobra karakteristika.
13:03
We can save that one.
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Tu možemo zadržati.
13:06
We know we can use that.
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Znamo da to možemo iskoristiti.
13:08
We can make a chicken with teeth.
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Sada možemo stvoriti kokoš sa zubima.
13:12
That's getting closer.
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To je približavanje.
13:14
That's better than a glowing chicken.
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To je bolje od fluorescentne kokoši.
13:16
(Laughter)
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(Smijeh)
13:18
A friend of mine, a colleague of mine,
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Moj prijatelj i kolega,
13:20
Dr. Hans Larsson at McGill University,
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doktor Hans Larsson na McGill sveučilištu
13:22
is actually looking at atavisms.
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zapravo proučava atavizme.
13:24
And he's looking at them
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Proučava ih
13:26
by looking at the embryo genesis of birds
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na način da proučava ptičju embriogenezu
13:29
and actually looking at how they develop,
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i zaista gleda kako se razvijaju.
13:32
and he's interested in how birds actually lost their tail.
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Zainteresiran je za to kako su ptice zapravo izgubile svoj rep.
13:36
He's also interested in the transformation
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Također je zainteresiran za transformaciju
13:38
of the arm, the hand, to the wing.
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ruke, šake u krilo.
13:41
He's looking for those genes as well.
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Proučava i te gene.
13:43
And I said, "Well, if you can find those,
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I ja sam mu rekao, „Pa ako možeš naći te,
13:46
I can just reverse them
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ja ih mogu samo preokrenuti
13:48
and make what I need to make for the sixth-graders."
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i pretvoriti ih u ono što mi treba za šestaše“.
13:51
And so he agreed.
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Pa se složio.
13:53
And so that's what we're looking into.
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I sada to proučavamo.
13:55
If you look at dinosaur hands,
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Ako pogledate dinosaurove ruke,
13:57
a velociraptor
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velociraptor
13:59
has that cool-looking hand with the claws on it.
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ima ruku koja super izgleda i ima kandže.
14:01
Archaeopteryx, which is a bird, a primitive bird,
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Archaeopteryx, koji je ptica, primitivna ptica
14:04
still has that very primitive hand.
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još uvijek ima veoma primitivnu ruku.
14:07
But as you can see, the pigeon,
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Ali kao što možete vidjeti, golub
14:09
or a chicken or anything else, another bird,
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ili kokoš ili bilo što drugo, bilo koja druga ptica
14:11
has kind of a weird-looking hand,
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ima ruku veoma čudnog izgleda
14:14
because the hand is a wing.
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jer je ruka krilo.
14:16
But the cool thing is
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Ali super je
14:18
that, if you look in the embryo,
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to što dok pogledate embrij,
14:21
as the embryo is developing
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kako se embrij razvija
14:23
the hand actually looks
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ruka izgleda
14:26
pretty much like the archaeopteryx hand.
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prilično isto kao i ruka archaeopteryxa.
14:28
It has the three fingers, the three digits.
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Ima tri prsta, tri prsta ruke.
14:31
But a gene turns on that actually fuses those together.
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Ali čini se da ih gen zapravo spaja.
14:34
And so what we're looking for is that gene.
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I ono što tražimo je taj gen.
14:37
We want to stop that gene from turning on,
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Želimo zaustaviti taj gen
14:39
fusing those hands together,
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prilikom spajanja tih ruku
14:41
so we can get a chicken that hatches out with a three-fingered hand,
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tako da dobijemo kokoš koja će se izleći s rukom na kojoj su tri prsta
14:44
like the archaeopteryx.
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poput archaeopteryxa.
14:46
And the same goes for the tails.
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Isto je i s repom.
14:49
Birds have basically
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Ptice u principu
14:52
rudimentary tails.
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imaju rudimentarne repove.
14:54
And so we know
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I znamo
14:57
that in embryo,
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da se u embriju,
14:59
as the animal is developing,
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kako se životinja razvija,
15:01
it actually has a relatively long tail.
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nalazi relativno dugačak rep.
15:04
But a gene turns on
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Ali „upali“ se gen
15:06
and resorbs the tail, gets rid of it.
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i razgradi rep, riješi ga se.
15:09
So that's the other gene we're looking for.
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To je dakle drugi gen koji tražimo.
15:12
We want to stop that tail from resorbing.
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Želimo zaustaviti razgradnju tog repa.
15:16
So what we're trying to do really
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Ono što zaista pokušavamo napraviti
15:19
is take our chicken,
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je uzeti svoje pile,
15:22
modify it
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modificirati ga
15:24
and make the chickenosaurus.
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i napraviti pilesaurusa.
15:26
(Laughter)
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(Smijeh)
15:29
It's a cooler-looking chicken.
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To je pile koje će bolje izgledati.
15:32
But it's just the very basics.
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Ali je to osnova.
15:35
So that really is what we're doing.
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To je ono što zaista radimo.
15:37
And people always say, "Why do that?
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I ljudi uvijek kažu, „Zašto to raditi?
15:39
Why make this thing?
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Zašto raditi takve stvari?
15:41
What good is it?"
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Koje je dobro u tome?“
15:43
Well, that's a good question.
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Pa, to je dobro pitanje.
15:45
Actually, I think it's a great way to teach kids
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Zapravo, mislim da je to odličan način kako naučiti djecu
15:47
about evolutionary biology
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nešto o evolucijskog biologiji
15:49
and developmental biology
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i razvojnoj biologiji
15:51
and all sorts of things.
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i raznim stvarima.
15:53
And quite frankly, I think
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I sasvim iskreno, mislim
15:56
if Colonel Sanders
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kad bi pukovnik Sanders
15:58
was to be careful how he worded it,
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bio pažljiv u tome kako bi to sročio,
16:01
he could actually advertise an extra piece.
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mogao bi zaista reklamirati ekstra komad.
16:04
(Laughter)
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(Smijeh)
16:08
Anyway --
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Kako god --
16:12
When our dino-chicken hatches,
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kada se izlegne naše dino-pile,
16:16
it will be, obviously, the poster child,
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bit će očito, dijete za poster
16:19
or what you might call a poster chick,
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ili ono što bi mogli nazvati poster komad,
16:22
for technology, entertainment and design.
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za tehnologiju, zabavu i dizajn.
16:25
Thank you.
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Hvala vam.
16:27
(Applause)
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(Pljesak)
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