Why do honeybees love hexagons? - Zack Patterson and Andy Peterson

2,655,874 views ・ 2014-06-10

TED-Ed


Please double-click on the English subtitles below to play the video.

00:06
Honeybees are fascinating creatures for a number of reasons:
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their incredible work ethic,
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the sugary sweet syrup they produce
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and their intricate social structure.
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But another reason is that honeybees are, in fact,
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excellent mathematicians.
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Scientists claim the tiny insects can calculate angles,
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and can even comprehend the roundness of the Earth.
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But there's particular mathematical bee genius
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behind the most important aspect of honeybee life: the hive.
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Just like humans, bees need food and shelter to stay alive.
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The hive is not only the bees' home,
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but doubles as a place to store their honey.
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Since it's so central to survival,
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honeybees have to perfect the hive's architectural design.
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If you examine any piece of honeycomb,
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you'll see that it's constructed from
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tightly packed hexagonal, or six-sided, cells.
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Of all the possible designs,
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why do honeybees choose this one?
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To understand, you need to think like a bee.
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Bees need a secure place for their entire colony to live.
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Similarly, there needs to be a place
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where their nectar can be stored and ripened suitably
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until it turns into honey.
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That means there's a need for some serious space efficiency.
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A good solution is to build little storage units, or cells,
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just big enough for a bee to fit into,
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which can also double as the containers in which nectar is stored:
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The bees' very own honey jars.
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The next thing, is to decide what the little cells should be made out of.
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Bees don't have beaks or arms to pick up things,
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but they are capable of producing wax.
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The thing is, producing it is a lot of hard work.
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Bees have to consume 8 ounces of honey
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to produce just 1 ounce of wax.
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So they don't want to waste it.
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So, they need a design that allows them to store
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the largest possible amount of honey
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using the least amount of wax.
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What shape does that?
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Imagining for a minute that all bees had to
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attend architecture academy and go to math class.
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Let's say they asked their geometry teacher,
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"What shape would give us the most space to store our honey,
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but require the least amount of wax?"
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And then geometry teacher replied,
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"The shape that you're seeking is the circle."
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Leaving the bees to return to their trial construction site
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and begin building their honeycomb using circular cells.
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After a while, some of them might have noticed
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a problem with their design:
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small gaps between the cells.
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"We can't even fit in there! That's wasted space!"
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they might have thought.
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So, ignoring the geometry lesson,
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and taking matters into their own hands,
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the bees went back to the drawing board
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to rethink their beehive design.
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One suggested triangles,
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"We can use triangles. Look! They fit together perfectly."
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Another bee suggested squares.
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Finally, a third bee piped up and said,
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"Pentagons don't seem to work, but hexagons do!
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We want the one that will use the least amount of wax
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and be able to store the most amount of honey.
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Yes, I think that's the hexagon."
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"Why?"
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"It looks more like the circle than the others."
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"But how do we know for sure?"
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To find out, the industrious insect architects
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calculated the areas of the triangle, the square and the hexagon
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and found that the hexagon was, in fact,
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the shape that gave them the most storage space.
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They agreed on an ideal size and returned to work.
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The space efficient comb that is a bee's trademark today,
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is probably the result of this trial and error,
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but over long periods of evolutionary history.
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However, it paid off.
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Peek into any hive --
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with your protective goggles and netting on, of course --
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and you'll see the end result: a beautiful compact honeycomb
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that any architect would have be proud to design.
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