(March of the Penguins, National Geographic film ) Penguins in a colony pack extremely tightly together, but still shuffle around without crushing anyone.
Math is Behind Cozy Penguin Huddles
Delicious Reddit

NOVEMBER 17, 2012
Stephanie Pappas, Senior Writer

Blanchette and his colleagues have made mathematical models of penguin huddles, varying wind strength and turbulence to see what sort of shapes arose. The model calculated which penguin along the edge of the huddle would be coldest and had that penguin move toward the center of the huddle in a sort of constant rotation.
Read more: MSNBC News