Physics is the study of the underlying laws and mechanisms explaining how the universe works. Most of what we do in daily life is based on a principle or law of physics—dealing with forces, motion, ...

For most of the 20th century, physicists largely ignored living systems. They understood living things as machines, albeit ones made of gooey parts. A subfield called biophysics uncovered specific ...

The particles that are in an atom: protons, neutrons and electrons The particles that are in protons and neutrons: quarks The four fundamental forces: gravity, electromagnetism, the strong force and ...