Learn about Earth Day founder Gaylord Nelson (1916–2005) and how environmental disasters of his day inspired the creation of Earth Day in 1970. On December 7, 1972, Apollo 17 astronauts captured a now ...

Excavations on unpromising mounds in the Iraqi desert revealed Sumer’s earliest city. Surviving relics and a rebuilt temple have given experts more clues about the ancient metropolis of Eridu.

While most estimates place the current human population at around 8.2 billion, a new study suggests we might be vastly underrepresenting rural areas.

We’ve tested this year’s best mattresses for a restful night’s sleep, from Simba to Tempur, Emma and Silentnight. They are: Best mattress overall – Simba Hybrid Pro Best value mattress ...