Scientists continue to look for signs of alien life on Mars, but this scientist truly popularized the idea, claiming to find ...

A new paper suggests that BARSOOM may have been alive on the planet, and was killed in the Viking experiments.

One researcher hypothesizes that experiments carried out by NASA's Viking landers in 1976 could have inadvertently killed microbes living in Martian rocks. Other experts are skeptical. When you ...

Turns out evidence of alien life might well have been discovered much closer to home.

We could be one step closer to proving alien existence. In 1996, a group of NASA scientists made a stunning announcement: The discovery of what appeared to be bacterial fossils on Mars. President Bill ...

Add Yahoo as a preferred source to see more of our stories on Google. The best reason to send humans to Mars isn’t for guts or glory—or the construction of colonies to safeguard against existential ...