The Aztecs sacrificed 250,000 people a year, about 1% of their population

Until 1936, a jump ball in basketball occurred in at center court after every basket made

The term soccer originated in England, first appearing in the 1880s as an Oxford "-er" abbreviation of the word "association"

On Saturn's moon Titan, gravity is so low and the atmosphere is so thick that humans could fly by flapping arms like wings

There is a black hole at the center of most galaxies

98% of the atoms in the human body are replaced every year with new ones