Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Scientists aren't sure what color dinosaurs were.
312
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199