Operation PBSUCCESS involved CIA actions in Guatemala in 1954.

The first Olympic marathon winner, Spiridon Louis, was a Greek shepherd who had never trained formally.

Aboriginal Australians have oral traditions and songlines that preserve ecological knowledge going back tens of thousands of years.

The Boston Marathon is the world's oldest annual marathon, first held in 1897.

Particles can exist in multiple states until observed.

Operation PBSUCCESS involved CIA actions in Guatemala in 1954.

Tax avoidance and tax evasion both increase as tax rates rise, which can reduce total revenue.

Traditional batik fabric dyeing in Indonesia is protected as an Intangible Cultural Heritage by UNESCO.

The tradition of the white wedding dress was popularized by Queen Victoria in 1840 — before that, brides wore any color.