A cubic yard of air weighs about 2 pounds at sea level.
31
Cold water weighs more than hot water.
93
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Diamonds can be shattered with a hammer.
-104
Indoor pollution is 10 times more toxic than outdoor pollution.
62