For thousands of years, humanity has looked up at the stars asking the same question. Are we alone? Then one day, it finally ...

Finding certain complex molecules in large quantities on another world could be a sign of life. Living things build complicated molecules in bulk, and chemistry without life mostly doesn’t.

Scientists may have just taken one of the biggest steps yet in the search for life beyond Earth. Meet K2 18 b, a distant ...

Add Yahoo as a preferred source to see more of our stories on Google. A new study suggests alien life could be going undetected because scientists focus more on avoiding false discoveries than missing ...

When it comes to the search for life elsewhere in the universe, methane and other chemical compounds are seen as signs of biology because they are often produced by living microbes. However, ...

An artist's impression of the Habitable Worlds Observatory that will search spectroscopically for biosignatures on exoplanets. . | Credit: NASA's Goddard Space Flight Center Conceptual Image Lab.

In the late 1950s, a small group of scientists began to search for alien life. Among them was geneticist Joshua Lederberg at Stanford, who in 1960 spoke at the First International Space Science ...

Hollywood makes initiating alien contact seem much easier than it has proven to be. In E.T. the Extraterrestrial, E.T. got stranded on earth when his alien compadres abandoned their botany mission. In ...

"Hearst Magazines and AOL may earn commission or revenue on some items through these links." English science fiction writer Arthur C. Clarke once said, “Two possibilities exist: either we are alone in ...

The loneliness of being "all alone in space" was something I felt was lacking in 'The Martian'.This work depicts that ...

“Any entity, no matter how many tentacles it has, has a soul,” Brother Guy Consolmagno, director of the Vatican Observatory, has said. Steven Spielberg thinks proof of alien life would “mess up” a lot ...