7 Surprising Facts About Nature, Sleep, and Everyday Life

1. Did You Know What Noise Has "Color"?
You’ve probably heard of “white noise”, a steady, even sound like a fan running. It helps many people sleep or concentrate better. Scientists found that white noise can calm the brain and block out other sounds. You can even buy recordings of it!

2. Did You Know Which Animal Is Best at Camouflage?
We often think of the chameleon, but the real camouflage champion is the squid. It can change not just its color, but also the texture and shape of its body to blend in with its surroundings and hide from predators.

3. Did You Know Where the World’s Longest Suspension Bridge Is?
It’s in Japan and is called the Pearl Bridge. The space between its two main towers stretches almost 2 kilometers (1,991 meters), and the full length of the bridge is nearly 4 kilometers!

4. Did You Know Fish Can Sleep?
Even though fish don’t have eyelids and can’t close their eyes, they do sleep! At night, they slow down, stay still, and react less to what’s around them. Fish need natural darkness to rest.

5. Did You Know When a Lake Turns White?
In very cold places, lakes and rivers freeze in winter. Most frozen lakes look white and cloudy because light can’t pass through the thick ice. But once in a while, the ice freezes in a way that stays clear and you can see right through it!

6. Did You Know Why Baby Teeth Fall Out?
As grown-up teeth start to come in, they release a special enzyme that slowly dissolves the roots of the baby teeth. Without roots, the baby teeth loosen and fall out, making room for the permanent teeth.

7. Did You Know How Day and Night Happen?
The Earth is always spinning. As it turns, one part of the world faces the sun, bringing daylight, while the other part moves into the shadow, bringing night. This constant spinning gives us our days and nights.