Whereas general relativity took a single genius (Einstein) a decade to create, that deeper theory -- known as a quantum theory of gravity -- has flummoxed generations of geniuses for a century.
Perhaps there is no dividing line between human beings and the rest of the universe, and what they do, if that action emerges from their depths, has a quality as natural as thunder or rain.
The famed physicist reveals a new idea for how information might be able to escape a black hole.
Quantum computers are already here in a limited form, and fully functional versions are on the way. They will be as transformative for mankind as were the mainframe computers, personal computers, and smartphones that we all use. As do all advancing technologies, they will also create new nightmares. The most worrisome development will be in cryptography.