The QWERTY keyboard layout was designed partly to slow typists down and prevent typewriter jams.

Particles can exist in multiple states until observed.

Carthage was destroyed by Rome in 146 BCE.

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

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

Music can influence mood and emotional state.

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

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

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