The smallest thing on earth is the quark. Quarks are elementary particles that make up protons and neutrons, which in turn form the nucleus of an atom. They are so tiny that they cannot be seen even with the most powerful microscopes. Quarks are fundamental particles, meaning they are not made up of anything smaller. They come in different types, known as flavors, such as up, down, charm, strange, top, and bottom. The study of quarks and other subatomic particles is a key part of particle physics, helping us understand the fundamental building blocks of the universe.
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