Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Diamonds can be shattered with a hammer.
-104
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Scientists aren't sure what color dinosaurs were.
312