Where not to look in the search for ET

There's a question at the heart of SETI that doesn't get nearly enough attention. It isn't whether aliens exist, and it isn't whether we have the technology to detect them. It's a far more practical problem: With a billion ...

Astronomers find a four-carbon sugar in deep space

The space between stars may seem like a barren desert, but over the past few decades scientists have been finding all sorts of interesting chemicals in it. From the precursors to proteins to the building blocks of cell membranes, ...

ExoMars rover targets vast bed of clay in search for life

In the region where the ExoMars Rosalind Franklin rover will search for signs of life, clay deposits extend beyond previous estimates, a new study finds. One hypothesis even suggests a vast ocean once covered the landing ...

page 4 from 40