Cold water weighs more than hot water.
93
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Most dust particles in your house come from dead skin.
48
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A cubic yard of air weighs about 2 pounds at sea level.
31