Is humanity alone? No. Period. As Douglas Adams says, the universe is a really big place. The question is, why haven't we had contact? Well, you know, I actually don't think that's a hard question. First, how long have we been looking? 50 years, max? Second, how could aliens find us, out here on the edge of the galaxy, until we waved at them, which we've only been doing for about 100 years, a mere tick of the clock, using a method so primitive that even creatures with our minimal intelligence...

Is humanity alone? No. Period. As Douglas Adams says, the universe is a really big place. The question is, why haven't we had contact? Well, you know, I actually don't think that's a hard question. First, how long have we been looking? 50 years, max? Second, how could aliens find us, out here on the edge of the galaxy, until we waved at them, which we've only been doing for about 100 years, a mere tick of the clock, using a method so primitive that even creatures with our minimal intelligen...