While imperceptible to humans, these tiny delays are significant for experiments that rely on pulsars as ultra-precise cosmic ...

Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

A composite view of Mars taken by the Viking I and II probes. NASA/USGS In September, NASA announced the discovery of a possible sign of life, known as a potential biosignature, on Mars. The ...

We live in a very exciting time: answers to some of the oldest questions humanity has conceived are within our grasp. One of ...

Europa is one of Jupiter’s 95 moons, and, perhaps, among the planet’s most famous orbiters. It’s covered in a shell of ice ...

A crowd-sourced search for alien intelligence called SETI@Home is in its final stages, analyzing 100 radio signals of ...