They hope they will help us understand the 'strong force' that holds the insides of atoms together.
Scientists have found new ways in which quarks, the tiniest particles known to humankind, group together.
The new pentaquark decays into particles that none of the others produce, while the two tetraquarks have the same mass, suggesting they may be the first known pair of exotic structures. Working out miniscule differences between the tiniest things we know about may seem arcane, but the interaction of quarks creates the so-called "strong force" that holds the insides of atoms - and by extension our entire Universe - together.
And in the 1960s, it became clear that neutrons and protons themselves were made from smaller particles still, called quarks; and that the interaction of quarks was tied to one of the fundamental forces of nature called the strong force.
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