Will humanity survive enough to colonize another planet?

The number of things that can cause the extinction of humans are not only numerous, but happen with some frequency relative to the history of complex species on our planet. Things like ice age, massive world suffocating volcanic explosions, continental shifts, tsunamis, locusts, Jersey Shore, etc. Add to the daunting number of "natural disasters" native to our rather touchy ball of dirt all of the many threats from space, from solar flares to a stray gamma burst to an asteroid that comes out of nowhere.

That's not even counting the dozen or so countries with nuclear weapon capability and the other few dozen sporting other "weapons of mass destruction". Have I mentioned the possibility of cataclysmic climate change? We seem to be a few dozen years off from really being able to poke around our own solar system with anything like an encouraging amount of confidence. It seems like we're perhaps hundreds of years from scooting around farther than that and even then we wouldn't be close to a planet we'd consider hospitable. So yeah, that record player we sent out with Chuck Berry is probably it. Sorry man.