If dark matter particles decay, then scientists could hunt for signs of this process, including X-ray or gamma-ray radiation or even emitted "ghost particle" neutrinos, in vast clusters of galaxies.

Like ghosts in the void, virtual particles can materialize from (almost) nothing.

Plastic particles can enter tea in several different ways - and teabags may play a bigger role than many people realize.

Add Yahoo as a preferred source to see more of our stories on Google. If dark matter particles decay, then scientists could hunt for signs of this process, including X-ray or gamma-ray radiation or ...

"Hearst Magazines and AOL may earn commission or revenue on some items through these links." If there weren’t any planets, stars, comets, asteroids, or other cosmic debris flying around, there would ...