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 ...

Her father even purchased an unused spacecraft for her. "The only flight-qualified Viking Lander that's not on Mars," said Tillman. Now, Tillman shares her knowledge with Gaiser and other young ...

NASA's InSight lander has taken what may be its last photograph of Mars, approaching its inevitable death with peaceful acceptance. "My power’s really low, so this may be the last image I can ...

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 ...