Debate over the origin of large-scale polygons on Mars continues even after several decades of detailed observations - as similarity in geometric patterns on the red planet and Earth have long sparked the imagination.
NASA has released a panoramic image depicting the ruddy terrain around the outcrop where the space agency's Opportunity rover spent its most recent Martian winter.
If there's any evidence of ancient life on Mars, it's likely to be found near the surface, new research suggests - dramatically upping the chances that it'll be discovered by the Curiosity rover, set to land next month.
There's vastly more water in Mars's mantle than previously thought - as much as on Earth, in fact - dramatically raising the chances that the planet might once have sustained life.
Clouds of snow blanket the Red Planet's poles during the dead of a Martian winter. However, unlike Earth's water-based snow, the particles on Mars are actually frozen crystals of carbon dioxide.
Scientists have discovered new types of organism living in one of the most inhospitable soils in the world - raising hopes that something similar could survive on Mars.
New, NASA-funded research indicates that very large molecules containing carbon - a key ingredient for the building blocks of life - have originated on Mars.
Astronauts signing up for long-term future missions to Mars and beyond will inevitably face a wide range of health issues, including microgravity-induced lymphocyte programmed cell death.
NASA's Mars Program Planning Group (MPPG) is starting to research its next Mars mission and is looking for help from scientists and engineers worldwide.
ESA’s Mars Express has discovered a series of 'pit-chains' in the Tharsis region of Mars that could, says ESA, be tempting targets in the search for microbial life.
