Maybe the ocean wasn’t the only habitable place four billion years ago.
Humans have left their mark in the geologic record, just as alien civilizations might on other worlds.
Water and organics are reported. Is there energy, too?
Which is better, a sample return mission or an onsite investigation?
An alien in our midst, in the form of a Caribbean chiton.
The search for extraterrestrial intelligence is improving, yes, but don’t give up on other astrobiological investigations just yet.
NASA takes the first step in a historic journey.
New evidence points to an origin 4.1 billion years ago.
Europe’s first Mars landing mission is due to get under way next spring.
Another week, another leap in our understanding of water on Mars, but with many open questions.
Water on the surface? Check. But that doesn’t automatically make the planet habitable.
As a sign of life on other planets, oxygen may not be the smoking gun some of us thought it was.
Similar deep habitats might be found on other worlds.
Another small step closer to a human mission to Mars.
NASA leaves open the possibility of a dedicated instrument on its Jupiter-bound spacecraft.
The newly discovered world gives us a preview of what Earth may look like 1.5 billion years in the future.
NASA takes a small step toward a big decision.
Non-biological intelligence offers another possible solution to the Fermi Paradox.
NASA’s Mars 2020 will be a great technology demonstrator, but is it right for astrobiology?
A sobering solution to Fermi’s Paradox