Balsa wood is classified as a hard wood!
41
Aluminum used to be more valuable than gold!
84
4.5 pounds of sunlight strike the Earth each day.
27
If the chemical sodium is dropped into water it will immediately and violently explode.
67
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Indoor pollution is 10 times more toxic than outdoor pollution.
62