Matter can be broken down to basic atoms, but you can also go far smaller than that: baryonic matter, quantum states, dark matter, and more.
Such exotic states are not limited to the laboratory. Just look at neutron stars: Their undead cores aren’t quite massive enough to collapse into black holes when they go supernova. Instead, as their cores crumple, intense forces rip apart their atomic nuclei and crush the rubble together. The result is essentially a giant ball of neutrons—and protons that absorb electrons, becoming neutrons in the process—and it’s very, very dense.
alone. Deep in their centers, some scientists think, pressures and temperatures are high enough to rip neutrons apart too. Those neutrons may break the quarks that form them. Physicists study neutron stars to learn about these objects—and what happened at the beginning of the universe. The matter we see around us did not always exist; it formed in
. Before atoms formed, protons and neutrons swam alone through the universe. Even earlier, before there were protons and neutrons, everything was a superheated quark slurry.
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