What do astronomers look for when they study exoplanets for signs of alien life? Hank explains how space telescopes are already yielding tantalizing clues of what other worlds might hold -- including water! -- and how the next generation of technology will be able to reveal to us. Like ...

Being the only observable intelligent life in the universe gets lonely sometimes, so it's no wonder we're trying to find something out there to phone home about. Hosted By: Savannah Geary ---------- Huge thanks go to the following Patreon supporter for helping us keep SciShow Space free for ...

We’ve done a lot of searching for life in the universe and we need to continue to if we hope to make contact. But not all of our attempts were expected to succeed. That’s where Beacon in the Galaxy comes in. Hosted By: Hank Green ---------- Huge thanks go to the following Patreon supporter ...

Look up at the night sky and, if you're away from city lights, you'll see stars. The space between those bright points of light is, of course, filled with inky blackness. Some astronomers have wondered about that all that dark space — about how dark it really is. "Is space truly black?" says ...