Scientists aren't sure what color dinosaurs were.
312
Each day, up to 150 species of life become extinct.
-23
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
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
No matter how cold it gets, gasoline will not freeze.
107