Three thought experiments involving “demons” have haunted physics for centuries. What should we make of them today?

Neutrinos are one of the most mysterious particles in the universe, often called "ghost particles" because they rarely ...

The first Denisovan skull, an ancient hunter’s toolkit and a Roman man’s brain that has turned to glass: here are our picks ...

Scientists finally caught solar neutrinos triggering a rare atomic transformation once thought nearly impossible to observe.