Zoology

Today You Should Know answers your curious questions about how the world works. Here's everything we've covered (so far) on the topic of zoology. Whether you're interested in why cats purr or how whales communicate, there will definitely be something that satisfies your curiosity about how the world works.

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Why do dogs have an extra paw pad on their front legs?
Why do dogs have an extra paw pad on their front legs?

These corn-chip-smelling paw pads serve a helpful purpose.

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Why do camels have humps?
Why do camels have humps?

“My humps, my humps, my lovely, fatty lumps.”

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Why do lizards do push ups?
Why do lizards do push ups?

Lizards do push-ups to show off, display dominance, and regulate heat. So we have more in common with lizards than we think!

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How do whales communicate with each other?
How do whales communicate with each other?

“Woooooowwwwwwooohhhhhh wwonnnkkkkkwoaaaaaaaaaaahhhhhhhhhhhoooooooooooooooooooooooooooooooooawooooo” - Whales

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How are sloths not extinct yet from natural selection?
How are sloths not extinct yet from natural selection?

Survival of the fittest? Sloths have taken a different approach.

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Why do cats "make biscuits"?
Why do cats "make biscuits"?

They are (probably) not trying to open a bakery.

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What happens to an insect that hitches a ride far from their home?
What happens to an insect that hitches a ride far from their home?

It turns out that insects are prolific hitchhikers.

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Why do dogs wag their tails?
Why do dogs wag their tails?

A wag doesn’t necessarily mean the dog is happy.

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How and why do cats purr?
How and why do cats purr?

And learn why NASA tried to replicate purring to help fight against bone density loss in its astronauts.

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