Science Facts for Kids

Fire doesn't have a shadow because it produces light rather than blocking it.

Your fingernails grow about 3 to 4 times faster than your toenails.

A rainbow is actually a full circle, but we usually only see half of it because the ground gets in the way.

Your sense of smell is most closely linked to memory — a smell can instantly bring back a memory from years ago.

On a clear dark night, the human eye can see a candle flame from about 1.7 miles away.

There are more viruses on Earth than stars in the entire universe.

Ice floats because it's less dense than liquid water — this is very unusual, as most solids sink in their own liquid.

There's enough iron in the human body to make a small nail about 3 inches long.

The 2011 earthquake in Japan was so powerful it shifted Earth's axis and shortened the day by 1.8 microseconds.

Your stomach acid is strong enough to dissolve small pieces of metal.