Nizar Ibrahim: How we unearthed the spinosaurus

120,197 views ・ 2015-04-24

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Prevodilac: Mile Živković Lektor: Milenka Okuka
00:12
These dragons from deep time are incredible creatures.
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Ovi zmajevi iz davnih vremena su predivna stvorenja.
00:17
They're bizzarre,
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Bizarni su,
00:19
they're beautiful,
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predivni su
00:20
and there's very little we know about them.
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i o njima znamo veoma malo toga.
00:23
These thoughts were going through my head
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Ove misli prolazile su mi kroz glavu
00:26
when I looked at the pages of my first dinosaur book.
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kada sam gledao po stranicama moje prve knjige o dinosaurusima.
00:30
I was about five years old at the time,
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Tada sam imao oko pet godina
00:33
and I decided there and then
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i tada sam odlučio
00:35
that I would become a paleontologist.
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da ću postati paleontolog.
00:37
Paleontology allowed me to combine my love for animals
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Paleontologija mi je omogućila da kombinujem
svoju ljubav prema životinjama
00:41
with my desire to travel to far-flung corners of the world.
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sa željom da putujem u udaljene krajeve sveta.
00:45
And now, a few years later, I've led several expeditions
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Sada, nekoliko godina kasnije, vodio sam nekoliko ekspedicija
00:48
to the ultimate far-flung corner on this planet, the Sahara.
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do najudaljenijeg od udaljenih krajeva na ovoj planeti, Sahare.
00:54
I've worked in the Sahara because I've been on a quest
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Radio sam u Sahari jer sam bio u potrazi
00:58
to uncover new remains of a bizarre, giant predatory dinosaur
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da otkrijem nove ostatke bizarnog, ogromnog dinosaurusa,
01:03
called Spinosaurus.
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grabljivice zvane spinosaurus.
01:06
A few bones of this animal have been found
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Pronađeno je nekoliko kostiju ove životinje
01:09
in the deserts of Egypt
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u pustinjama Egipta
01:11
and were described about 100 years ago by a German paleontologist.
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i pre oko 100 godina ih je opisao nemački paleontolog.
01:16
Unfortunately, all his Spinosaurus bones were destroyed in World War II.
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Nažalost, sve njegove kosti spinosaurusa uništene su u Drugom svetskom ratu.
01:21
So all we're left with are just a few drawings and notes.
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Sve što nam je ostalo je nekoliko crteža i beleški.
01:25
From these drawings,
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Iz ovih crteža,
01:27
we know that this creature, which lived about 100 million years ago,
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znamo da je ovo stvorenje, koje je živelo pre oko 100 miliona godina,
01:30
was very big,
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bilo veoma veliko,
01:32
it had tall spines on its back, forming a magnificent sail,
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imalo je velike bodlje na leđima koje su činile predivno jedro,
01:35
and it had long, slender jaws, a bit like a crocodile,
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vilica mu je bila duga i uska, pomalo nalik na krokodila,
01:41
with conical teeth,
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sa zubima konusnog oblika
01:43
that may have been used to catch slippery prey, like fish.
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kojim je možda lovio klizav plen, poput ribe.
01:48
But that was pretty much all we knew
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Ali to je bilo sve što smo znali
01:50
about this animal for the next 100 years.
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o ovoj životinji narednih 100 godina.
01:58
My fieldwork took me to the border region between Morocco and Algeria,
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Moj terenski rad odveo me je
do graničnog predela između Maroka i Alžira,
02:03
a place called the Kem Kem.
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do mesta zvanog Kem Kem.
02:05
It's a difficult place to work in.
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To je teško mesto za rad.
02:08
You have to deal with sandstorms and snakes and scorpions,
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Imate posla sa peščanim olujama i zmijama i škorpijama
02:11
and it's very difficult to find good fossils there.
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i tamo je veoma teško naći dobre fosile.
02:15
But our hard work paid off.
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Ali naš težak rad se isplatio.
02:17
We discovered many incredible specimens.
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Otkrili smo mnogo sjajnih primeraka.
02:20
There's the largest dinosaur bone
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Tu je najveća kost dinosaurusa
02:21
that had ever been found in this part of the Sahara.
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koja je ikada pronađena u ovom delu Sahare.
02:25
We found remains of giant predatory dinosaurs,
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Pronašli smo ostatke ogromnih dinosaurusa grabljivica,
02:28
medium-sized predatory dinosaurs,
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dinosaurusa grabljivica srednje veličine
02:31
and seven or eight different kinds of crocodile-like hunters.
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i sedam ili osam razlčitih vrsta grabljivica nalik krokodilima.
02:37
These fossils were deposited in a river system.
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Ovi fosili su bili smešteni u rečnom sistemu.
02:40
The river system was also home to a giant, car-sized coelacanth,
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Rečni sistem takođe je bio dom ogromnog celakanta veličine automobila,
02:44
a monster sawfish,
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ogromne testerače
02:47
and the skies over the river system were filled with pterosaurs,
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a nebo iznad rečnog sistema bilo je prepuno pterosaurusa,
02:51
flying reptiles.
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letećih reptila.
02:53
It was a pretty dangerous place,
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Bilo je to prilično opasno mesto,
02:55
not the kind of place where you'd want to travel to if you had a time machine.
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tamo ne biste želeli da otputujete kada biste imali vremeplov.
03:00
So we're finding all these incredible fossils of animals
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Pronalazili smo sve ove neverovatne fosile životinja
03:03
that lived alongside Spinosaurus,
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koji su živeli u isto vreme sa spinosaurusom,
03:05
but Spinosaurus itself proved to be very elusive.
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ali sam spinosaurus se ispostavio kao težak za uhvatiti.
03:08
We were just finding bits and pieces
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Nalazili smo samo deliće
03:10
and I was hoping that we'd find a partial skeleton at some point.
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i nadao sam se da ćemo u nekom trenutku pronaći delimičan skelet.
03:15
Finally, very recently,
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Konačno, nedavno smo uspeli
03:17
we were able to track down a dig site
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da pronađemo mesto za kopanje
03:20
where a local fossil hunter found several bones of Spinosaurus.
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gde je lokalni lovac na fosile pronašao nekoliko kostiju spinosaurusa.
03:25
We returned to the site, we collected more bones.
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Vratili smo se na lokaciju, skupili smo još kostiju.
03:28
And so after 100 years we finally had another partial skeleton
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Tako smo nakon 100 godina konačno imali delimični skelet
03:32
of this bizarre creature.
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ovog bizarnog stvorenja.
03:34
And we were able to reconstruct it.
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I mogli smo da ga rekonstruišemo.
03:36
We now know that Spinosaurus had a head
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Sada znamo da je spinosaurus imao glavu
03:38
a little bit like a crocodile,
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pomalo nalik na krokodila,
03:39
very different from other predatory dinosaurs,
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veoma drugačiju od drugih dinosaurusa grabljivica,
03:42
very different from the T. rex.
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drugačiju od tiranosaurusa reksa.
03:44
But the really interesting information came from the rest of the skeleton.
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Ali zaista zanimljive informacije dobili smo od ostatka skeleta.
03:49
We had long spines,
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Imali smo dugačke bodlje
03:51
the spines forming the big sail.
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koje su formirale veliko jedro.
03:53
We had leg bones, we had skull bones,
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Imali smo kosti nogu, kosti lobanje,
03:55
we had paddle-shaped feet, wide feet --
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široka stopala u obliku vesala -
03:59
again, very unusual, no other dinosaur has feet like this --
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opet, veoma neobično,
nijedan drugi dinosaurus nema ovakva stopala
04:02
and we think they may have been used to walk on soft sediment,
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i mislimo da su verovatno bili naviknuti na hodanje po mekoj podlozi
04:05
or maybe for paddling in the water.
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ili veslanje po vodi.
04:07
We also looked at the fine microstructure of the bone,
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Takođe smo posmatrali i finu mikrostrukturu kosti,
04:11
the inside structure of Spinosaurus bones,
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unutrašnju strukturu kostiju spinosaurusa
04:13
and it turns out that they're very dense and compact.
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i ispostavlja se da su veoma guste i kompaktne.
04:16
Again, this is something we see in animals that spend a lot of time in the water,
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Opet, ovo je nešto što vidimo
kod životinja koje dosta vremena provode u vodi,
04:19
it's useful for buoyancy control in the water.
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korisno je za kontrolu plovnosti u vodi.
04:23
We C.T.-scanned all of our bones and built a digital Spinosaurus skeleton.
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Sve kosti smo stavili pod rendgen i napravili digitalni skelet spinosaurusa.
04:28
And when we looked at the digital skeleton,
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I kada smo pogledali digitalni skelet,
04:30
we realized that yes, this was a dinosaur unlike any other.
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shvatili smo da je ovo zaista jedinstven dinosaurus.
04:35
It's bigger than a T. rex,
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Veći je od tiranosaurusa reksa,
04:36
and yes, the head has "fish-eating" written all over it,
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i sve u vezi sa njim naglašava da jede ribu,
04:39
but really the entire skeleton has "water-loving" written all over it --
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ali zapravo ceo skelet nam je govorio da on voli vodu -
04:43
dense bone, paddle-like feet, and the hind limbs are reduced in size,
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guste kosti, stopala nalik veslima i smanjeni zadnji udovi
04:48
and again, this is something we see in animals
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i opet, ovo je nešto što viđamo kod životinja
04:50
that spend a substantial amount of time in the water.
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koje provode značajne količine vremena u vodi.
04:54
So, as we fleshed out our Spinosaurus --
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Dok smo na našeg spinosaurusa nabacivali meso -
04:58
I'm looking at muscle attachments and wrapping our dinosaur in skin --
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gledam vezivanje mišića i obmotavanje našeg dinosaurusa kožom -
05:02
we realize that we're dealing with a river monster,
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shvatamo da imamo posla sa rečnim čudovištem,
05:06
a predatory dinosaur, bigger than T. rex,
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dinosaurusom grabljivicom, koji je veći od tiranosaurusa reksa,
05:08
the ruler of this ancient river of giants,
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vladara ove prastare reke džinova,
05:11
feeding on the many aquatic animals I showed you earlier on.
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koji se hranio mnogim vodenim životinjama koje sam vam ranije pokazao.
05:14
So that's really what makes this an incredible discovery.
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To je ono što ovo otkriće čini neverovatnim.
05:17
It's a dinosaur like no other.
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To je dinosaurus nalik nijednom drugom.
05:18
And some people told me, "Wow, this is a once-in-a-lifetime discovery.
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Neki ljudi su mi rekli: "Opa, ovo je otkriće života.
05:22
There are not many things left to discover in the world."
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Na svetu nije ostalo još mnogo toga da se otkrije."
05:26
Well, I think nothing could be further from the truth.
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Mislim da je istina daleko od toga.
05:29
I think the Sahara's still full of treasures,
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Mislim da je Sahara još prepuna blaga
05:32
and when people tell me there are no places left to explore,
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i kada mi ljudi kažu da nema više mesta za istraživanje,
05:35
I like to quote a famous dinosaur hunter, Roy Chapman Andrews,
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volim da citiram čuvenog lovca na dinosauruse,
Roja Čepmena Endrusa,
05:39
and he said, "Always, there has been an adventure just around the corner --
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a on je rekao: "Avantura je uvek bila tik iza ćoška,
05:45
and the world is still full of corners."
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a svet je još prepun ćoškova".
05:47
That was true many decades ago
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To je bilo istina pre mnogo decenija
05:49
when Roy Chapman Andrews wrote these lines.
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kada je Roj Čepmen Endrus napisao ove reči.
05:51
And it is still true today.
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Istina je i danas.
05:53
Thank you.
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Hvala vam.
05:54
(Applause)
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(Aplauz)
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