Iron weighs more after it rusts.
68
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
According to studies, men change their minds two to three times more often than women.
72
Each day, up to 150 species of life become extinct.
-23
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17