Mars is even more like Earth than we thought, according to a statistical analysis of the planet's swirling atmosphere.
After its thrusters shut off prematurely, the European Space Agency's newest lander probably crash-landed from 2–4 kilometers above the surface.
Although the mission’s lander might not have survived, the new Trace Gas Orbiter spacecraft will explore clues that may indicate extraterrestrial life.
Water-carved valleys may be relatively young, challenging assumptions about the history of the Red Planet's climate.
A new hypothesis might reconcile two opposing theories that have tried to explain Mars's mysterious history for more than 40 years.
NASA has set a new 2018 launch date for a spacecraft to probe the Red Planet's interior, after instrument failure hobbled preparations for the mission.
New orbiter data support an important role for seasonal frost—not liquid water—in the formation of Martian gullies.
Investigating oxalate minerals in the Atacama Desert provides a terrestrial analogue to test techniques that could be used to study the carbon cycle in the cold deserts of Mars.
Manganese deposits in Gale Crater fractures are similar to Earth features that usually require flowing water and highly oxidizing conditions.
A new theoretical model suggests that ancient floods that carved canyons on Earth and Mars may have been much smaller but lasted longer than previously thought.