PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE ***** Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetime On our search for alien lifeforms we scan for primitive biosignatures, and ...

The question of whether extraterrestrial life, or aliens, exist has been asked for centuries. Even as many scientists reject the idea, there is some new evidence of their existence. Welcome to Factnomenal and in this video, we’ll be going through some of that evidence gathered by AI - because we ...

Lisa Kaltenegger is the Director of the Carl Sagan Institute at Cornell and works from Sagan's old office. In this episode of The Space Show, she reveals how we may be just a few years away from answering humanity's greatest question: are we alone in the universe? Watch more from this series: ...

How long will it be before we find alien life on exoplanets? Exoplanet astronomer Dr. Ryan MacDonald explains how biosignatures can be found in exoplanet atmospheres. He also reveals how the discovery of the first close-in planet around a white dwarf could dramatically accelerate the hunt for ...