“PHYSICS is full of opposites. For every action, there’s a reaction; every positive charge has a negative; every magnetic north pole has a south pole. Matter’s opposite number is antimatter. And for black holes, meet white holes. Black holes are notorious objects that suck in everything around them. Famously, not even light can escape their awesome gravity. White holes, in contrast, blow out a constant stream of matter and light – so much so that nothing can enter them.”
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