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

This time, people are imagining what aliens would reconstruct if they came across the skulls of some of the most loved residents on our planet, like cats, dogs, and wild cutie pies. Scroll down to see ...

Introduction -- Form vs function : what is common across worlds? -- What are animals and what are aliens? -- Movement - scuttling and gliding across space -- Communication channels -- Intelligence ...

ADVANCED alien civilisations might be talking to each other across the vast reaches of space using a “firefly” technique.

To celebrate Alien: Earth landing on Hulu, we asked a zoologist if any of the Xenomorph's infamous characteristics occur in the natural world When you purchase through links on our site, we may earn ...

A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b. But not everyone agrees that it signals life. An illustration shows what ...