Why We Might Be Alone in the Universe
Season 5 Episode 38 | 12m 24s Video has closed captioning.
Why does it appear, that humanity is the lone intelligence in the universe? The answer might be that planet Earth is more unique than we've previously assumed. The rare earth hypothesis posits exactly this - that a range of factors made Earth exceptionally unusual and uniquely able to produce intelligent life.
Problems Playing Video? | Closed Captioning