|
|
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).