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 ...

A new international study partially funded by NASA on how Mars got its iconic red color adds to evidence that Mars had a cool but wet and potentially habitable climate in its ancient past.

In the 1970s, NASA’s Mariner 9 and Viking 2 were the first missions to ... “The Mariner 9 orbiter first imaged giant canyons ...

Experts weigh in on whether President Donald Trump’s lofty goal of sending humans to Mars and back is feasible during his second term.

Vincent Chevrier, associate research professor at the University of Arkansas Center for Space and Planetary Sciences, is part ...

This image of Mars' Valles Marineris hemisphere, captured on July 9, 2013, is a composite created from 102 images taken by ...

This view of Mars' Valles Marineris hemisphere from July 9, 2013, is a mosaic of 102 Viking Orbiter images. At the centre is the Valles Marineris canyon, over 2,000 km long and up to 8 km deep. This ...

The "Face on Mars" captured by NASA's Viking 1 orbiter in 1976 (left) and Mars Global Surveyor in 2001 (right) The desire to attribute geometric formations on Mars to intelligent design taps into ...

Data from Zhurong provide an unprecedented look into rocks buried near a proposed shoreline billions of years old. The researchers claim to have found beach deposits from an ancient Martian ocean.

A new international study partially funded by NASA on how Mars got its iconic red color adds to evidence that Mars had a cool but wet and ...

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 ...