Balsa wood is classified as a hard wood!
41
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The average temperature at 40,000 feet above sea level is -60 F.
56
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89