PBS
Pbs: Exploring Space: The Quest for Life
Alien life is often theorized in many ways throughout popular culture. This site by the Public Broadcasting System attempts to shed light on the studies and exploration that are currently underway to uncover such life. This well rounded...
PBS
Nova: Do Aliens Exist in the Milky Way?
Does alien life exist? Explore the arguments both pro and con. Make your own opinion known by participating in an online poll and then find out what the majority believe.
Other
Space Science Institute: Alien Earths: Search for Life
How do you recognize life on another planet? What tests do scientists use to determine if something is a life form when they are many light years away from being able to observe it directly? Try your hand at interactives to create a...