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There are more nerve cells in one human brain than there are stars in the Milky Way.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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