A scientist argued that a Viking lander experiment in 1976 detected microbial life on Mars and urged NASA to repeat the tests before future missions. Trump wants his peace board signed in Davos.

Add Yahoo as a preferred source to see more of our stories on Google. Getty Images Courteney Cox and Jennifer Aniston at the American Film Institute's 46th Life Achievement Award Gala Tribute to ...

Courteney Cox and Jennifer Aniston had another hairstyling session on Instagram. In the video, Cox helps Aniston experiment with dyeing her hair brown. Aniston then jokes that her blonde hair is "fake ...

What if…. you could swim in Titan’s lakes? Saturn’s largest moon, Titan, is unique. It has its own atmosphere. Why Venezuela’s oil may be far more trouble ...