Astrophysicists have discovered the first potentially habitable planet outside our solar system. It's called Gliese 581G, and it's about 20 light-years from Earth. If we got tired of living here, how would we get to Gliese 581G?Coming from an i-rag as mainstream as Slate, this makes me wonder if there may really be a sea change in progress in the mainstream media, regarding their treatment of the subject of extraterrestrial life. One can always hope. To read the rest of the article, click here.