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If you’ve ever peered into the eyes of a cat or a goat, you’ll have noticed that pupils can come in quite a few shapes and sizes. And those are just two among a great many animals – including geckos, toads, stingrays and cuttlefish – that demonstrate the diversity of pupil shapes in nature. With stylish and clever animation, this video from TED-Ed takes a brief dive into animal vision, detailing the wide range of pupil types in the eyes of the animal kingdom, as well as the fascinating ways they can shape perception and indicate a creature’s place in their ecosystem.
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History of science
Ideas ‘of pure genius’ – how astronomers have measured the Universe across history
29 minutes
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Meaning and the good life
Why Orwell urged his readers to celebrate the spring, cynics be damned
11 minutes
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Making
On the Norwegian coast, a tree is transformed into a boat the old-fashioned way
6 minutes
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Animals and humans
One man’s quest to save an orphaned squirrel, as narrated by David Attenborough
14 minutes
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Computing and artificial intelligence
A future in which ‘artificial scientists’ make discoveries may not be far away
9 minutes
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Earth science and climate
Images carved into film form a haunting elegy for a disappearing slice of Earth
3 minutes
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Biology
Butterflies become unrecognisable landscapes when viewed under electron microscopes
4 minutes
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Engineering
Can monumental ‘ice stupas’ help remote Himalayan villages survive?
15 minutes
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Cognition and intelligence
A father forgets his child’s name for the first time in this poetic reflection on memory
4 minutes