“It’s a very, very beautiful calculation, but it’s the best example I know of the relationship between these rather abstract quantities perhaps and something that you can look at in a telescope.”

Many, from neuroscientists to philosophers to anesthesiologists, have claimed to understand consciousness. Do physicists? Does anyone?

There are limits to where physics makes meaningful predictions: beyond the Planck length, time, or energy. Here’s why we can’t go further.

“Quantum mechanics and quantum entanglement are becoming very real. We’re beginning to be able to access this tremendously complicated configuration space to do useful things.”

Despite no experimental evidence showing that gravitons exist, they remain a respectable concept in the world of professional physicists.