The Large Hadron Collider at CERN passed its first key tests today, firing two proton beams in opposing directions around a 17-mile underground ring. Scientists hope to use the collider to recreate the conditions a split second after the Big Bang. Click here(1) for more on today's experiments.

1. http://ap.google.com/article/ALeqM5g5nGPtmoUVIJDgehVJ_snD6vDA6gD9342FUG0