Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Your brain is 80% water.
525
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Iron weighs more after it rusts.
16
A cubic yard of air weighs about 2 pounds at sea level.
31
One ragweed plant can release as many as one billion grains of pollen!
51