The Great Filter theory suggests humans have already conquered the threat of extinction

It's difficult to not be pessimistic when considering humanity's future prospects. Many people would agree that it's more likely than not that we'll eventually do ourselves in. And in fact, some astrobiologists theorize that all advanced civilizations hit the same insurmountable developmental wall we have. They call… »12/21/12 2:00pm12/21/12 2:00pm