Scientists at the Large Hadron Collider managed to make two proton beams collide at high energy Tuesday, marking a "new territory" in physics, according to CERN, the European Organization for Nuclear Research.

An experienced diver and master sergeant in the Korean navy died Tuesday while conducting rescue efforts for 46 South Korean seamen who were aboard a patrol ship when it sank, a military official said.

The 53-year-old chief master sergeant lost consciousness while underwater in the Yellow Sea, the official said. He was taken aboard a U.S. navy ship, but could not be resuscitated.

The 1,200-ton patrol ship Cheonan was carrying 104 sailors when an apparent explosion caused it to capsize Friday night in the Yellow Sea near a disputed maritime border between North and South Korea. Fifty-eight sailors were rescued, but hopes are fading for the remaining 46. No bodies or survivors have been found.