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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

