From one of the most dynamic rising stars in astrophysics, an accessible and eye-opening look—in the bestselling tradition of Sean Carroll and Carlo Rovelli—at the five different ways the universe could end, and the mind-blowing lessons each scenario reveals about the most important concepts in physics.We know the universe had a beginning. With the Big Bang, it went from a state of unimaginable density to an all-encompassing cosmic fireball to a simmering fluid of matter and