(぀◔ΰ±ͺβ—”)γ€β”β˜†οΎŸ.*ο½₯q゚ The 2023 TKSST Gift Guide βœ©Β°ο½‘β‹†ο½₯゚ Β 
Get smart curated videos delivered to your inbox.   SUBSCRIBE
The Kid Should See This

How do animals see in the dark?

Watch more with these video collections:

How do animals see in the dark… and sometimes in color? Learn more about the night vision of the tarsier, cats, toads, and hawkmoths in this illuminating animation from TED Ed, which explains:

“On a sunny day, upwards of 100 million times more photons are available to the eye than on a cloudy, moonless night. Photons aren’t just less numerous in darkness, but they also hit the eye in a less reliable way. This means the information that photoreceptors collect will vary over time, as will the quality of the image.”

night eyes

“In darkness, trying to detect the sparse scattering of randomly arriving photons is too difficult for the eyes of most daytime animals. But for night creatures, it’s just a matter of adaptation. One of these adaptations is size.

“Take the tarsier, whose eyeballs are each as big as its brain, giving it the biggest eyes compared to head size of all mammals. If humans had the same brain to eye ratio, our eyes would be the size of grapefruits. The tarsier’s enlarged orbs haven’t evolved to make it cuter, however, but to gather as much light as possible.”

what if humans had eyes like a tarsier?
Learn more about eyes in these videos:
β€’ Animals with night vision
β€’Β How do animal eyes see the world?
β€’ Why do cats have vertical pupils?
β€’Β Why do goats have rectangular pupils?
β€’Β The case of the green-eyed squid

Bonus: How does your brain help you see color?

🌈 Watch these videos next...

Why is it so hard to catch a fly? A visit to The Robot Zoo

Rion Nakaya

Why do goats have rectangular pupils?

Rion Nakaya

Why do cats have vertical pupils?

Rion Nakaya

What are those floaty things in your eye? – TED Ed

Rion Nakaya

This is What Outer Space Does to Your Body

Rion Nakaya

The Snail-Smashing, Fish-Spearing, Eye-Popping Mantis Shrimp

Rion Nakaya

The Moon Illusion – TED Ed

Rion Nakaya

The Blind Astronomer of Nova Scotia

Rion Nakaya

Scallops have lots of tiny eyes that act like tiny telescopes

Rion Nakaya