Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Most dust particles in your house are made from dead skin!
67
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
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
4.5 pounds of sunlight strike the Earth each day.
27
