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That is why doctors say playing outside in the dirt is healthy . A very clean house with no germs leaves your immune army bored and weak. So next time you get muddy, tell your parents: "I am training my soldiers." 4. THE SECRET LIFE OF PENCILS (Graphite vs. Diamond) You write with a pencil. Your mom might have a diamond ring. Did you know they are the exact same thing ?

THE SUPERPOWERS HIDING IN YOUR ROOM Why do cats always land on their feet? Can a videogame make you smarter? We investigate the "ultra-secrets" of everyday life.

A glass full of water (to the brim), a piece of stiff cardboard (like from a cereal box), and courage. junior muy interesante

Cats have a "righting reflex." When they fall, their flexible spine twists in two phases. First, they turn their head to see the ground; then, their body follows like a gymnast doing a half-turn. In less than one second, they use the laws of (the same force that makes an ice skater spin faster when they pull their arms in) to land on their paws.

Place the cardboard over the glass. Press your hand on the cardboard and flip the glass upside down. Slowly remove your hand. That is why doctors say playing outside in

It only works if you play with attention and variety . Playing the same level 1,000 times doesn't train your brain; it just trains your thumb. The real "smart drug" is trying new games that make you solve puzzles. 3. THE INVISIBLE ARMY ON YOUR SKIN (Don't Panic!) This sounds like a horror movie, but it is wonderful. Right now, there are millions of microscopic creatures living on your eyebrows and in your belly button. They are called microbes , and without them, you would be very sick.

Scientists at the University of Rochester discovered that playing action games (like platformers or racing games) for 30 minutes a day can improve your by 20%. That means you can spot a typo in your homework faster or catch a baseball that seemed impossible to reach. THE SECRET LIFE OF PENCILS (Graphite vs

1. THE GYMNASTICS OF YOUR CAT (The Physics of Falling) Have you ever seen your cat fall off the couch and land like nothing happened? It looks like magic, but it is actually physics in a fur coat .