A group of scientists are proposing (yet another) theory that explains dark matter and why the whole universe wasn't annihilated by anitparticles billions of years ago. This time they're proposing a super-dense particle that, due to its makeup, prefers to decay in a unique, asymmetrical way that would naturally lead to the universe we see now. Me, I think it sounds pretty convenient, but they do claim there are existing experiments which should be able to disprove the idea. Hey, why not?