Are we alone in the universe? There are good reasons to suspect that we have company. After all, the universe is exceptionally large, with possibly billions of Earth-like planets in our Milky Way ...

Scientists have just completed an extensive search for signs of alien communications technology in the Milky Way's 'solar system 2.0'. Penn State astronomers and scientists at the SETI Institute, ...

Wondering whether we're alone in the cosmos is almost a rite of passage for human existence. It's a mystery that scientists – and stargazers – have pondered for many years. The Fermi Paradox poses a ...

Astrophysicist proposes a ‘radically mundane’ theory for why humans have yet to encounter extraterrestrials For centuries, great thinkers have pondered why, given the hundreds of billions of planets ...

Solar winds and coronal mass ejections may scatter narrow signals, making them harder for Earth-based telescopes to detect. The SETI Institute uses radio telescopes to search for signs of intelligent ...