The marathon race commemorates a legendary run in ancient Greece.

The first Olympic Games were held in 776 BC in Olympia, Greece, and featured only a single footrace.

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.

Velociraptors were smaller than often portrayed in movies.

The Louvre in Paris is the world's largest art museum, with over 35,000 works on display.

The mathematical constant tau (τ = 2π) is championed by some as more natural than pi for describing circles.

The first woman to win the Nobel Prize was Marie Curie in 1903 — she won a second in 1911.

The city of El Dorado was a legendary golden city in South America.