"If a message arrived from aliens, who exactly would respond and how?"As a child, isn't this a theme you've thought about at ...

The closest potentially habitable planet to Earth, Proxima Centauri b, is about 4.2 light-years away. Yet we have not seen ...

Explore the possibility of intelligent life beyond Earth, including scientific estimates of alien civilizations in the Milky Way. From Proxima Centauri b to Kepler-22b and Gliese 667 Cc, this video ...

Finding a signal from an extraterrestrial civilization takes more than just pointing a telescope in the right direction. We ...

Voyager 1 is on a journey that will outlast civilizations, outlive the Sun’s familiar neighborhood, and eventually drift into ...

When we think of extraterrestrial intelligence that might be out there among the stars, we tend to think of creatures not too ...

A massive spaceship appears in the night sky. Communications are cut off, and cities around the world are attacked. Humanity rises above national borders to make a final stand against an enemy with ...

Astronomers are always on the lookout for radio signals from outer space. Here on Earth, we rely on these signals for virtually all forms of wireless communication. Bluetooth and Wi-Fi are two ...

An alien radio signal from K2-155 d? Are there any alien civilizations out there? For several decades, scientists have been searching for evidence that they exist. That effort is collectively known as ...

Most sci-fi fans are familiar with classic alien invasion movies like "Invasion of the Body Snatchers" and "Independence Day." Still, not every film can be a hit, and there are gems out there that fly ...

Scientists have detected direct, localized radio emissions from an exoplanet for the very first time. But don't call the Space Force and White House hotline just yet—these signals are not alien ...