We officially have no idea what causes ultra-powerful cosmic rays

Cosmic rays generate the most energetic particles in the universe, utterly dwarfing anything we can generate in particle accelerators. Astrophysicists thought these cosmic rays were created in powerful gamma-ray bursts. Turns out they were completely, utterly wrong. So now what? » 4/19/12 5:00pm 4/19/12 5:00pm

Ultra-powerful, super short cosmic explosions could ravage life on Earth

In the ultimate cosmic cataclysm, two ultra-dense bodies collide. For less than a second, incredible amounts of super-charged particles explode forth. These blasts could wipe out most life on Earth...and it's probably happened dozens of times already. » 10/09/11 12:45pm 10/09/11 12:45pm