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Why do people need to sleep? How do we actually go to sleep? How does sleeping get rid of toxins in the brain? And how come when it's nighttime I don't…

Curious kids are hearing about the impeachment trial of US President Donald Trump. So But Why is helping them understand what impeachment is and what…

Do animals get married? Do they fall in love and have friends? Do they laugh when they're happy and cry when they're sad? When you talk to your pets, can they understand you? Why can't they speak to us? And do animals know what kind of animal they are? Alyssa Arre of the Comparative Cognition Lab at Yale tackles these interesting questions.

Why do lions roar? Why do crickets chirp? Why do bucks shed their antlers every year? How can porcupines and hedgehogs avoid poking themselves? Do fish…

Why do we like to eat certain foods? Why do some people like to eat spicy food? And what's up with kids not liking vegetables? Why does pineapple hurt…