In this episode we hear from astronomer Laura Danly about the search for life on other planets.

Scientists have been searching for aliens in our solar system and beyond, but have not yet found evidence that life exists beyond Earth.

Neil and comedian co-host Eugene Mirman discuss the tricks the human brain can play on our perception, the physics of space travel, and science fiction movies that depict alien spaceships.

So we know what life needs here to work, and we’ve talked a little about what life COULD look like on other planets. But what about plant life?

In this episode of Crash Course Kids, Sabrina gives us some ideas about what we might find out there… some day.

Could aliens actually exist? Is there any chance they’ve visited Earth already? What really happened at Roswell?

Is it possible that the pyramids were built with a helping hand… from aliens?