Sputnik skies to analysis of interstellar visitors, scientists are rethinking how and where to look for physical traces of ...

In her new book "First Contact," journalist Becky Ferreira explores the scientific search for alien life, our cultural obsessions with extraterrestrials and why the truth may be more human than we ...

SETI@home has been one of the largest citizen science projects ever, with millions of users around the world.

For as long as humans have looked up at the night sky, we've wondered who, or what, might be looking back. From ancient myths about gods descending from the heavens to 20th-century UFO sightings and ...