“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.

In the year 2000, physicists created a list of the ten most important unsolved problems in their field. 25 years later, here’s where we are.

There was a lot of hype and a lot of nonsense, but also some profoundly major advances. Here are the biggest ones you may have missed.

Scalars, vectors, and tensors come up all the time in physics. They’re more than mathematical structures. They help describe the Universe.