The average temperature at 40,000 feet above sea level is -60 F.
56
One cubic foot of gold weighs more than 1,200 pounds!
78
Most dust particles in your house are made from dead skin!
67
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Most dust particles in your house come from dead skin.
48
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The storage capacity of human brain exceeds 4 Terrabytes.
140