Four scientists made the case Aug. 1 to a panel of senators that they should fund NASA's search for life beyond Earth.
With every new exoplanet discovered, the same question arises: Could this world host life? That capability requires so much more than liquid water.
A team of researchers pursuing the search for extraterrestrial intelligence has decided to revive a scale meant to ground alien-detection alerts in reality.
The 21st century's longest total lunar eclipse entranced skywatchers around the globe today (July 27).
Just because we'll never be able to give one sharp-eyed human a name doesn't mean there's nothing interesting to learn about the history of observing Mars.