Right now, for the first time in nearly 100 years, Ramadan, Lent, and Lunar New Year are all happening at the same time — within hours of each other. The last time this occurred was around 1927. The ...

Over the last few years, optical atomic clocks have broken record after record in precision timekeeping. Atoms are cooled to ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. A rare atmospheric effect ...