Astronomers swept millions of candidates and found no alien signals from K2-18b, setting the first power limit on any transmitter there.

For decades, scientists have been actively searching for signs of extraterrestrial life. Fromradio waves to laser flashes and infrared heat signatures, the hunt for alien technosignatures has captivated both researchers and the public. However, despite the ...

If advanced aliens lived on a planet within a few hundred to a thousand light years away from Earth, then vast numbers of their signals must already have crossed Earth without being noticed, a new study finds. Astronomers have searched the skies for signs ...

What steps can be taken to identify why we haven’t received radio signals from an extraterrestrial intelligence, also called technosignatures? This is what a recent study published in The Astrophysical Journal hopes to address as a team of scientists ...

A mysterious radio signal has been traced to a galaxy far, far away. And, it's causing a stir among astronomers -- although nobody is sure what it is. Research published this week in the journal Nature suggests the fast radio burst came from beyond the ...

Advanced aliens could be chatting with each other using light flashes in plain sight, similar to how fireflies communicate, according to a new study that could lead to new approaches in finding extraterrestrial civilisations. Until now, astronomers have ...

One of the longest-standing techniques in humanity’s search for life beyond Earth may be causing scientists to miss alien signals entirely, a new study finds. Since the very beginnings of the search for extraterrestrial intelligence (SETI), narrowband ...