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blue bits. red rocks.
Monday 18 June 2012

So how might the universe do us in? Well, there are solar superflares, supernovae, and giant black holes that might veer past our sun. Or micro black holes, colliding with the Earth and gobbling us from within. Or getting caught in the searchlight sweep of a magnetar or gamma-ray burst, or a titanic explosion in the galactic center. Or what if our solar system slams at high speeds into a dense molecular cloud, sending a million comets falling our way? Or how about classics? Like collision with an asteroid? (More on that, later.) Then there are those supervolcanos, still building up pressure beneath Yellowstone and a dozen other hot spots — giant magma pools at super-high pressure, pushing and probing for release. Yes we had a scare already. But one, medium-sized belch didn’t make the threat go away. It’s a matter of when, not if. David Brin

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