From The Week, April 9, 2010:
"World doesn't end: After months of delay, the Large Hadron Collider finally revved into action this week, smashing subatomic particles together at close to the speed of light in a simulation of the Big Bang. The LHC, the world's largest particle accelerator, is a 17-mile-long underground ring that cost $10 billion to build. ... Rolf-Dieter Heuer, head of the European Organization for Nuclear Research, which operates the collider, says it will usher in, 'a new period of discovery in the history of mankind.' A few alarmists ... had theorized that the collider could produce a black hole that would swallow Earth and kill all 6.8 billion inhabitants. So far, that has not happened."
There's at least one post-apocalyptic fear debunked. Expect a similar blog post from me on December 22, 2012.