If you are reading this, the world has not ended.
Today, at 12:00 AM PST, CERN researchers fired up their massive Hadron Collider. The "L" in LHC stands for "Large," but it is much bigger than large. Some people think that it can cause a black hole right here on earth. If that happened, we would all be dead right now.
Maybe they haven't turned it on yet, though. Find out here.
If they haven't turned it on yet, please cross your fingers. I hope the scientists cross their fingers too.