Balsa wood is classified as a hard wood!
41
Iron weighs more after it rusts.
16
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Pumice is the only rock that floats on water.
14
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
The average temperature at 40,000 feet above sea level is -60 F.
56
According to scientists, the color of the cup that we're drinking from can alter our perception of the actual taste of the drink.
12