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.

NASA's Viking missions in the 1970s were groundbreaking, marking the first time humanity sent spacecraft to Mars with the goal of searching for life. Viking 1, launched in 1975, landed on the ...

Dirk Schulze-Makuch is a scientist who thinks NASA's Viking landers could have inadvertently destroyed the life they were searching for. In this Q&A, we ask why.

"The experiments performed by NASA's Viking landers may have accidentally killed Martian life by applying too much water," scientist Dirk Schulze-Makuch said.

Initially dismissed as Earthly contamination, later missions have confirmed these were native to Mars. Could the Viking landers have destroyed life’s only traces on the Red Planet?

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 ...

Gastrointestinal illness outbreaks on Princess Cruises and Viking ships sickened nearly 150 people. Among 1,894 guests aboard Princess’ Coral Princess ship, 59 reported being ill during its ...

One researcher is doubling down on a belief that we may have found life on Mars 50 years ago—and then killed it. The Viking missions from the 1970s were the first to search the red planet for ...

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.