When rockets fire into space, the insides of their engines become an extreme environment where temperatures soar and tiny ...

The study of these fast-moving particles provides significant clues about the early universe.

Our most powerful particle accelerators mimic near-light speeds of cosmic particles. But no upgrade may be capable of ...

Penn scientists may have found a way to power future AI with exotic light-matter particles instead of electrons.

Scientists have discovered that ultraheavy atomic nuclei could explain some of the highest-energy cosmic rays ever observed.

In less than a millionth of a second after a nuclear detonation or a severe nuclear reactor accident, an enormous burst of ...

Going to smaller and smaller distance scales reveals more fundamental views of nature, which means if we can understand and describe the smallest scales, we can build our way to an understanding of ...

Empty space, despite how we think of it, may not be as empty as we assume. Although we cannot detect the virtual particles present in empty space, their presence is necessary to predict, ...