Japan has more than 5.5 million vending machines, selling everything from hot soup to fresh eggs.

Competitive swimming only standardized pool lengths to 50 meters for the Olympics in 1924.

Hip-hop culture originated in the South Bronx in the early 1970s and encompasses DJing, MCing, breakdancing, and graffiti art.

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

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

In 2000, a massive fireworks accident damaged part of a Dutch city.

The modern Olympic Games began in 1896 in Athens, Greece.

The lost city of Ubar is mentioned in Arabian legends.

Facial expressions are recognized across many cultures.