NASA's Viking missions to Mars may have inadvertently eliminated Martian life. The missions used water in experiments to detect life. Astrobiologist Dirk Schulze-Makuch believes this was a mistake.

In 1975, NASA's Viking 1 spacecraft entered orbit around Mars, carrying a mission to unlock the secrets of the Red Planet. Soon, it released twin landers that drifted toward the Martian surface ...

"Since Viking landed on Mars, many things have changed, and many things have not. What has not changed in the past 50 years is our understanding of the limits of life in cold and dry environments." ...

Could NASA’s Viking missions have wiped out life on Mars before we even knew it existed? According to an expert at Daily Galaxy, startling theory suggests that our search for Martian life may ...

The Viking missions, launched by NASA in 1975, were the first successful attempts to land on Mars and conduct detailed exploration. Viking 1 and Viking 2 each included an orbiter and a lander ...

For nearly 50 years, NASA has been exploring the possibility of microbial life on Mars.That investigation began with the Viking 1 lander, which entered orbit around the Red Planet in the mid-1970s ...

Life on Mars may have been found -- before it was accidentally destroyed during a prior NASA mission, one scientist has suggested. In 1975, just six years after Apollo 11 touched down on the moon ...

A new study reconsiders the controversial findings of NASA's Viking Mars lander in 1976, which some argue may have shown signs of past life on the Red Planet.

"We’re ultimately looking to discover life, and to do so, we have to think outside the box." In 1975, NASA's Viking 1 spacecraft entered orbit around Mars, carrying a mission to unlock the ...

In 1975, NASA's Viking 1 spacecraft entered orbit around Mars, carrying a mission to unlock the secrets of the Red Planet. Soon, it released twin landers that drifted toward the Martian surface and ...