After two false starts Tuesday, the Large Hadron Collider—a $10 billion particle accelerator near Geneva—smashed together its proton beams for the first time, marking a new era in physics with a clash of subatomic "cymbals."
It was a critical milestone in a troubled project that has brought together scientists from 34 countries. They are drawing on money and material from 150 universities and dozens of government agencies in a 15-year scientific gamble designed to reveal secrets of the universe hidden since time began.
OK, so if any of you went out without your keys yesterday or noticed any other disturbance in the space-time continuum, now you know why.
Next week we'll be trying to find out if it is possible to fall into a black hole and survive.
Don't worry about that tingling sensation in your feet.