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 ...

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 ...

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 ...

The curious minds at What If imagine finally discovering alien life on Mars, exploring the scientific, cultural, and ...