The most significant change since those 1970's experiments were conducted was the discovery of high levels of perchlorate on Mars. Perchlorate, plus abiotic oxidants, explains the Viking results ...

The samples were collected by the 'Sample Analysis at Mars' (SAM) – one of the instruments on-board NASA's Curiosity Rover which has been studying the Gale crater since 2012. It has a gas ...

In the 1970s, NASA’s Mariner 9 and Viking 2 were the first missions to spy features that suggested the presence of an ancient ocean on Mars. Utopia Planitia dates to the Hesperian Period ...

Fast forward to today, a new paper tackles and reconsiders the results of the Viking Biology experiments. "The discovery of perchlorate on Mars by the Phoenix mission has provided a basis for ...