Rainbows are actually full circles — we usually only see half because the ground gets in the way.

Apples float in water because they are about 25% air.

About 71% of Earth's surface is covered by water.

Some dinosaurs had feathers.

Ancient Egyptians used to play board games — one was called Senet.

Popcorn pops because of a tiny drop of water inside each kernel that turns to steam.

Sea turtles have been around since the time of the dinosaurs.