100 years before quantum mechanics, one scientist glimpsed a link between light and matter

The Irish mathematician and physicist William Rowan Hamilton, who was born 220 years ago last month, is famous for carving ...
Scientific American

Physicists Can’t Agree on What Quantum Mechanics Says about Reality

Quantum mechanics is one of the most successful theories in science — and makes much of modern life possible. Technologies ranging from computer chips to medical-imaging machines rely on the ...
Space.com

'This is the holy grail of theoretical physics.' Is the key to quantum gravity hiding in this new way to make black holes?

"This work is a step toward understanding how quantum mechanics and gravity work together, a major unsolved problem in physics." The first step toward quantum gravity, the "holy grail of physics," may ...
Nature

Why even physicists still don’t understand quantum theory 100 years on

Everyone has their favourite example of a trick that reliably gets a certain job done, even if they don’t really understand why. Back in the day, it might have been slapping the top of your television ...