It's highly unlikely life started organically on Earth, one expert suggests. But an extraterrestrial intervention might ...

What would it mean for humans if there were another species out there, and how big is the challenge when the human species is just a speck among others in space? The bigger problems and challenges ...

Aliens have been a point of interest for scientists, conspiracy theorists, science fiction lovers, and just about everyone else for a very long time. While most people think about aliens contacting us ...

The first sign of possible extraterrestrials detected in the cosmos didn't come in the form of little green aliens flying around in saucer-shaped spacecraft. In fact, the life that could be – emphasis ...

Whether or not we're alone in the universe is one of the biggest questions in science. A recent study, led by astrophysicist Nikku Madhusudhan at the University of Cambridge, suggests the answer might ...

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 ...

That raises the possibility that the TRAPPIST-1e exoplanet could also have liquid water and therefore support life.