The Reformation reshaped religious life across Europe.

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

The average professional soccer player runs about 10–13 km per match.

Light behaves as both a particle and a wave simultaneously — this is called wave-particle duality.

Project Blue Book officially ended in 1969.

Roman gladiatorial games were often less lethal than popular culture suggests — gladiators were expensive to train.

At the 1904 St. Louis Olympics, the marathon was so chaotic that the first man to finish was disqualified for riding part of the way in a car.

Coyote is a trickster figure in dozens of Native American mythologies across North America.

The word 'clue' originally referred to a ball of thread — in Greek mythology, Ariadne gave Theseus a thread to escape the labyrinth.