Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The average temperature at 40,000 feet above sea level is -60 F.
56
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Scientists aren't sure what color dinosaurs were.
312