Milwaukee got mostly failing grades for its ozone and particle pollution. That's everything from diesel engines to coal power ...

The Phoenix-Mesa area ranks as the 4th worst in the nation for ozone pollution, according to a new American Lung Association ...

Physicists know that their elegant theoretical description of forces and particles – the Standard Model – must be incomplete, ...

A pair of rare particles produced in high-energy proton collisions may be the clearest evidence yet that mass can emerge from empty space. The finding could shed light on one of the biggest puzzles in ...

Part of Physics (Single Science) Unit 1: Atomic and nuclear physics Most of the mass and all of the positive charge of an atom is in the nucleus. Most of an atom is empty space, (a vacuum). In 1897, ...