Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
A cubic yard of air weighs about 2 pounds at sea level.
31
Out of all the senses, smell is most closely linked to memory.
146
In zero gravity, a candle's flame is round and blue.
16
The bark of an older redwood tree is fireproof.
65
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71