Antibiotics are breeding yet more superbugs: "The TB bacillus ... has suddenly morphed into something virtually incurable. ... In a matter of days, it killed 52 out of 53 people who had it."*
Sometimes you just have to wonder if the reason we haven't been contacted by intelligent life is that the acceleration of civilization leads inevitably to self-extinction.
* If you don't read the full article, at least take some consolation in the fact that it seems to be harder to catch than ordinary tuberculosis.