hawking radiation

Okay. Here's hoping to hear from some of you theoretical physicists and cosmologists. Particle-antiparticle pairs are popping into existence all the time, but the energy of the universe as a whole is conserved because they annihilate each other quickly. When this occurs near the event horizon...

For your perusal: General relativity applied to an expanding universe supports two obvious sorts of curvature horizon: cosmological horizons and gravitational horizons. It might be nice if we could topologically transform one into the other, and treat both according to the same basic...

I've heard of virtual particles... but I thought in order for a particle to pop out of nowhere, another particle somewhere's gotta disappear? Am I wrong?