They may resemble kidney beans, but formations on the northern hemisphere of Mars are actually sand dunes covered in carbon dioxide frost; How cold winters are on Mars depends on ...

"Rootless cones form when lava flows over wet or icy ground, causing it to boil and explode," said Dundas. "The region around Athabasca Valles is covered by a huge lava flow field, and seeing rootless ...

Mars’s axis of rotation is tilted 25.2 degrees relative to the plane of the planet’s orbit around the sun, which helps give Mars seasons similar to those on Earth. Whichever hemisphere is ...

A NASA satellite has spotted frozen "kidney beans" on Mars' sand dunes trapped in place until springtime. Photographing them can help us determine if there was ever enough water on Mars to sustain ...