1. The speed of light is 186,287.49 miles per second but is rounded down to 186,000 miles per second.
2. DNA was first discovered in 1869.
3. One million, million, million, million, millionth of a second after the Big Bang the universe was the size of a pea.
4. Humans have 46 chromosomes, peas have 14, and crayfish have 200.
5. It takes a blood cell about 60 seconds to complete a circuit of the body.