In 1927, Einstein used a variant of the double slit experiment – at that time only a thought experiment – to argue that ...

The high ground has always held strategic and tactical importance—from mountaintops in ancient battles to the orbital vantage ...

The high ground has always held strategic and tactical importance—from mountaintops in ancient battles to the orbital vantage points of today. China and Russia are rapidly ...

Beneath the streets of Los Angeles lies one of the most prolific fossil sites in the world. At the La Brea Tar Pits, millions ...

Small grains in the Murchison meteorite have been estimated to be 7 billion years old—much older than the Earth, and even the ...