
Quark
The smallest known building block of matter.
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Quarks, atoms, and molecules — the building blocks underneath everything you can see or touch.
Everything smaller than the cell. Quarks and gluons inside the proton; the proton inside the atom; the atom inside the DNA helix; the helix inside the virus; the virus, in turn, dwarfed by a bacterium. Each step down this ladder is roughly a thousand times smaller than the last, so the human-scale intuition that 'small things differ by a bit' breaks completely. The micro-world is where you watch that intuition snap.
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The smallest known building block of matter.

Three quarks bound into one of nature's most stable forms.

The smallest piece of any chemical element.

The instruction book that builds you — and most of every other living thing.

Strands of code wrapped in protein.

Single-celled life, no nucleus required.

The smallest unit of life.