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Articles on Curious Kids

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Amazon workers sort packages for delivery on East 14th Street in New York City, July 12, 2022. Michael M. Santiago/Getty Images

How many Amazon packages get delivered each year?

The rise of e-commerce means billions of packages are delivered in the US each year. That creates traffic and pollution, but urban freight researchers are finding better way to get goods to customers.
Cash is pretty convenient. Dilok Klaisataporn/EyeEm via Getty Images

Why does money exist?

Paying for the stuff you want with currency is way easier than relying on chairs you made or chickens you raised.
Science shows that humans are happier and healthier around other animal and plant species. Artur Debat/Moment via Getty Images

Do humans really need other species?

People wouldn’t last long without the countless other species we depend on for survival.
Dogs use their tails to communicate. Eastimages/Moment via Getty Images

Why do animals have tails?

An anthropologist explains some of the many ways animals use their tails, from balancing as they walk to attracting a mate.

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