Aluminum used to be more valuable than gold!
84
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
A cubic yard of air weighs about 2 pounds at sea level.
31
Balsa wood is classified as a hard wood!
41
Research indicates that plants grow healthier when they are stroked.
173
Hot water can freeze faster than cold water.
181