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Articles on Curious Kids

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A tiger’s vertical stripes help it blend in with trees and grasses in its homelands in Asia. Frédéric Soltan/Corbis via Getty Images

Why do tigers have stripes?

How do tigers – a top predator – successfully hunt their prey when they have bright orange fur? The secret's in their stripes!
Geese fly day or night, depending on when conditions are best. sharply_done/E+ via Getty Images

How do geese know how to fly south for the winter?

Geese honk loudly and point their bills toward the sky when they're ready to start the migration. Here's how they know it's time, how they navigate and how they conserve energy on the grueling trip.
Palak Mehta

Curious Kids: how do vaccines kill viruses?

Vaccines work by teaching your immune system about new viruses. Your immune cells are very clever – they will remember what they learnt, and protect you if you encounter that virus in the future.
Breathing pure oxygen would be like fireworks exploding in your body. And that’s not always a good thing. Shutterstock

Curious Kids: what happens if you breathe pure oxygen?

You might think the more oxygen you breathe in the better. But too much oxygen can make you sick.
Fluorescent human cells seen through a microscope.

Curious Kids: what are cells made out of?

Our cells may be small, but they are mighty. And they are made of lots of amazing stuff, from the DNA that tells your body how to grow, to mini skeletons that let cells move around.
Flickr/Kelly Teague

Curious Kids: why is there gravity?

There is a reason why it's easier to roll marbles down rather than up a hill. And the answer (to this and to gravity itself) is all about acceleration.
Worker bees with capped brood (brown), open brood (white larva), all sorts of coloured pollen and shiny fresh nectar. Cooper Schouten

Curious Kids: how do bees make honey?

A single colony of bees can have 60,000 bees in it. Together, they can visit up to 50 million flowers each day to collect pollen and nectar. They're not called 'busy bees' for nothing!
A downpour or a drizzle: What causes the difference? David Pinzer Photography/Moment via Getty Images

Why does some rain fall harder than other rain?

Some rainstorms drench you in a second, while others drop rain in a nice peaceful drizzle. A meteorologist explains how rainstorms can be so different.
Shutterstock

Curious Kids: how did the first person evolve?

The oldest known skeleton of our species _Homo sapiens_ is about 300,000 years old. But there was a time when humans didn't exist at all and the world was covered in nothing but slime.

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