The discovery of more than 15,000 kilometers of ancient riverbeds on Mars suggests that the Red Planet may once have been ...

The James Webb telescope has made another stunning discovery -- this time of a massive planet that could potentially sustain ...

Over the past century, a host of figures from scientists to science fiction writers have tackled the issue of terraforming Mars—doing things to the planet that would make it habitable for humans.

NASA has arrived at two ways of returning samples collected on Mars to Earth. Now, the agency will test the options to see if the cache can make it back in the 2030s.