Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

A crowd-sourced search for alien intelligence called SETI@Home is in its final stages, analyzing 100 radio signals of ...

For decades, scientists have tried to turn the question of alien life from late-night speculation into something you can ...

As many as 200 worlds beyond our solar system discovered by astronomers may be larger than estimated, which could influence the search for extraterrestrial life. That's the theory of a team of ...

Real scientific efforts at universal communication have also involved mathematics and numbers. The covers of the Golden ...

The Deep Space Network (DSN) is just the sort of tool aliens could one-day detect, transmitting from Earth. Credit: NASA/JPL What if the first signal ever detected from an alien lifeform wasn't a ...

The director behind one of the year’s buzziest UFO documentaries is now openly suggesting that a sitting president could be the person who finally tells the world whether intelligent life exists ...

We’re celebrating 180 years of Scientific American. Explore our legacy of discovery and look ahead to the future. In the late 1800s Italian astronomer Giovanni Schiaparelli pointed a telescope at Mars ...

"We inch closer to understanding where life might be possible beyond this planet we call home." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

AMHERST, Mass. — While popular culture commonly depicts extraterrestrial life as little green men with large, oval-shaped heads, it’s most likely that if there is life beyond our planet and within our ...