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
What would photosynthesis look like around other stars?
Scientists have modeled possible plant behavior on alien worlds
Our concept of life is too Earth-centric — alien life might look totally different
There are over 100 scientific definitions of "life," and none might be accurate outside Earth
Those indestructible tardigrades probably won't take over the Moon
... but we should take interplanetary contamination seriously
“Where Are All The Aliens?”
The best answers to an old, tantalizing question