Quarks are fundamental particles that play a crucial role in the structure of matter. They are the building blocks of protons and neutrons, which make up atomic nuclei and are essential for the existence of atoms. Governed by the strong nuclear force, quarks combine in various ways to form larger particles, showcasing the complex interactions that define the physical universe.

In "A Short History of Nearly Everything," Bill Bryson explores these fascinating components of matter, emphasizing their significance in understanding the cosmos. The study of quarks helps illuminate the fundamental principles of physics and how matter is organized at the smallest scales, revealing the intricate tapestry of the universe.