The bark of an older redwood tree is fireproof.
65
Balsa wood is classified as a hard wood!
41
Scientists aren't sure what color dinosaurs were.
312
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
A cubic yard of air weighs about 2 pounds at sea level.
31