Usain Bolt's top recorded speed during his 100m world record was 44.72 km/h (27.8 mph).

Economist Arthur Laffer famously sketched the Laffer Curve on a napkin during a dinner meeting in the 1970s.

Humans are unique in their capacity for cumulative culture — each generation builds on the last rather than starting over.

Particles can exist in multiple states until observed.

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

There is a word in Japanese, 'tsundoku', meaning buying books and never reading them.

The maximum legal weight for a cricket ball is 163 grams — close to a baseball but harder.

A regulation NFL football must be inflated to between 12.5 and 13.5 psi.

Kenyan marathon runners dominate due to a combination of high-altitude training, genetics, and lean running economy.