Hal Haggard, associate professor of physics at Bard College.
Hal Haggard, associate professor of physics, talks with Space.com about white holes, cosmic phenomena that theoretically function like black holes in reverse. While nothing can escape a black hole, nothing can enter a white hole. To physicists studying black holes, the Big Bang’s explosion of matter and energy can look like potential white hole behavior. “The geometry is very similar in the two cases,” says Professor Haggard. “Even to the point of being mathematically identical at times.”