Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Cold water weighs more than hot water.
93
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Hot water can freeze faster than cold water.
181
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Scientists in Germany have developed a candy that doesn't cause cavities.
11