Particle physics describes the universe at the smallest scale. This includes subatomic particles, like protons and neutrons, as well as elementary particles, like quarks and electrons, which make up ...

Good air quality means few pollutants, while poor air quality indicates hazardous levels of pollutants like ground-level ...

The weak nuclear force doesn't play by the normal rules — and, in fact, it breaks one of the biggest rules of all.

Normal gases, like the air you breathe on Earth, are made up of atoms bouncing around. Atoms consist of a positively charged bundle of particles called the nucleus and negatively charged particles ...

It is dust made up of sand and mineral particles swept up from 3.5 million square miles of Africa's Sahara Desert. Also called the Saharan Air Layer (SAL) by the National Oceanic and Atmospheric ...

Dear Doctors: We live in the fire zone in Altadena, California. After the evacuations ended, we came home, and now my throat is constantly sore. There’s no smoke smell, but my husband says the air can ...

The regulatory compliance standards for modern pharmaceutical products are among the harshest in the world, demanding cutting-edge quality assurance and quality control procedures to ensure that ...

An artistic illustration of the mechanism proposed by Professor Stefano Profumo where quantum effects near the rapidly expanding cosmic horizon after the Big Bang gravitationally generate dark matter ...