A NASA‑linked study argues that alien probes could already be in our Solar System, but our surveys are still too crude to ...

Valley’s role | Compete respectfully | Stunted potential. Mercury News reader letters to the editor for June 17, 2026.

Every second, hypervelocity collisions may be blasting tiny flecks of Earth into space. Some of those grains, small enough to ...

You'll certainly be surprised to hear scientists response to claims made by Steven Spielberg about aliens being real. While ...

Our search for technosignatures—clear signs of advanced civilizations beyond Earth—takes many forms. Many are driven by the famous Drake equation, which attempts to estimate how many technological ...

Using the Keck Observatory, astronomers measured the spins of dozens of giant planets and brown dwarfs orbiting distant stars ...

Astronomers studying the atmospheres of several intensely heated exoplanets uncovered an unexpected pattern that may reveal a hidden property of these distant worlds.

We're disclosing what Steven Spielberg, Demi Lovato, Tom Cruise and more celebrities have said about the possibility that the ...

The nature of space, time and the evolution of life on Earth mean it’s unlikely extraterrestrial life has visited our home ...

If and when SETI discovers alien life, then a revised Declaration of Principles guarantees that once the discovery has been ...

Hints of high-pressure chemistry within a rare meteorite suggest this fallen space rock comes from a planet gone wrong in the ...

Scientists from the SETI Institute at Berkeley University, and Breakthrough Listen analyzed 3I/ATLAS for technosignatures.