Stephen Hawking is gone, but he has left behind something incredibly precious: a knotty, frustrating puzzle, one that scientists will be wrestling with for years to come. Dr. Hawking’s puzzle is an important piece of perhaps the biggest question in physics today: How can we reconcile gravity with quantum mechanics?
The early years of the 20th century witnessed two incredible scientific revolutions. One was the theory of relativity. Led by Albert Einstein, physicists discarded the absolute space and time of Isaac Newton, and replaced it with a unified four-dimensional space-time continuum. It is the warps and wiggles of space-time, Einstein realized, that give rise to what you and I experience as the force of gravity.… Seguir leyendo »