When the Viking 1 lander send down twin landers to study Mars in 1976, the results returned a negative result for the possibility of microbial life. However, for years, scientists have argued that the Viking's experimental techniques might’ve killed hygroscopic microbes living on Mars with too much water.

A scientist has said NASA may have accidentally killed life on Mars during a research mission to find it. For decades, scientists have been trying to find any signs of life on the Red Planet with no conclusive evidence as of yet.

For decades, scientists have posited that to find life on Mars they first need to find water. And in the absence of water, they have tried to see what happens when they introduce it onto the planet.