Elon Musk emphasizes the importance of an optimistic mindset in life, saying it's better to be wrong and optimistic than ...

The moon and Venus will shine vividly alongside a bright star in the early morning in a celestial rendezvous that should be visible across the U.S.

The Earth's protective ozone layer is on track to fully recover by mid-century, according to a report from the UN's World ...

Denmark's National Museum has unveiled what it calls the first true "portrait" of a Viking. The remarkably detailed ...