How bird flocks are like liquid helium, Science

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How Complex Wholes Emerge From Simple Parts

When is an atomic nucleus like a flock of birds?

Phase transition - Wikipedia

Why do thousands of birds fly together in a particular formation for a few hours early in the morning? Is there any scientific reason? - Quora

condensed matter - Physics of the beaker experiment for superfluid helium - Physics Stack Exchange

Birds' turns match math of quantum matter