On faster spinning planets, life could be hiding out under the atmosphere
Astrobiologists search for molecular oxygen as an indicator of life on other planets, but finding them isn't that straightforward
Rock varnish, the thin, dark coating on rocks' surfaces, is an indicator of life
Rock varnish is produced by magnesium-rich bacteria
NASA releases the most detailed photo of Jupiter's largest moon to date
The image of Ganymede was taken by the Juno spacecraft
Correctly identifying life on Mars will be more difficult than previously thought
New research highlights how mineral components of rock can look a lot like fossils