The world record for the 100m dash has dropped from 10.6 seconds in 1912 to 9.58 seconds today.

The lost city of Ubar is mentioned in Arabian legends.

Authority symbols increase compliance.

The Roman festival of Saturnalia — involving gift-giving, feasting, and role reversals — influenced Christmas traditions.

Ancient cave paintings at Lascaux, France, are approximately 17,000 years old and show remarkable artistic sophistication.

Atoms are 99.9999999999999% empty space — if an atom were scaled to the size of a football stadium, its nucleus would be a marble at the center.

Prehistoric cave paintings provide insight into early humans.

Ancient Greek athletes competed naked in the original Olympics — the word 'gymnasium' comes from the Greek for 'naked.'

Traditional Japanese kabuki theater originally featured women actors — they were banned in 1629, and men have played female roles ever since.