New research suggests that many planets previously considered promising for life may, in fact, be far less hospitable. A ...

We have no idea what kind of life may exist on other planets, so it’s hard to know what to look for. Proxima Kósmos imagines ...

In the Venus case, the potential clue was a faint spectral line in radio data, not a photograph of organisms in the clouds. One account of the controversy quotes Greaves describing the discovery as a ...

A faint blip on a telescope readout can set off a wave of excitement. Maybe it is a molecule tied to life. Maybe it is ...