A cubic yard of air weighs about 2 pounds at sea level.
31
Billions of neutrinos pass unnoticed through your body every second.
6
Research indicates that plants grow healthier when they are stroked.
173
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Out of all the senses, smell is most closely linked to memory.
146
The only letter not appearing on the Periodic Table is the letter "J".
180
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57