extraterrestrial life

Common ancestors?

Could Mars, of all places, be the place to look for early life on Earth? It’s an intriguing thought and one that astrobiologists take seriously as they consider the conditions during the early days of…


Signs of ancient life on Mars?

A careful study of images taken by the NASA rover Curiosity has revealed intriguing similarities between ancient sedimentary rocks on Mars and structures shaped by microbes on Earth. The findings suggest, but do not prove,…


The how-old-are-you quiz for stars

When you’re a kid every birthday is cause for celebration, but as you get older they become a little less exciting. You might not want to admit just how old you are. And you might…



Let’s all look for extraterrestrials

Scott Gaudi is tired of the fighting. An astronomer at Ohio State University in Columbus, he specializes in the notoriously fractious field of exoplanet research, in which battles have included bitter fights over data access…


No ‘2001’, no ‘Contact’, we’re lonely out here

The Milky Way may be home to some 3,000 extraterrestrial civilizations but the vast distances between our galactic cousins will make contact extremely rare, a new study concludes. Data collected by NASA’s Kepler space telescope…


Let’s find extraterrestrials

Before the invention of the telescope, before every continent was on a map, even before the revelation that Earth was not the center of the Universe, humans have wondered at the possibility of life beyond…