And for a bit more detail on what actually happens inside a chicken while it's forming the egg: https://vimeo.com/86122048 https://vimeo.com/86122048 Birds ar

And for a bit more detail on what actually happens inside a chicken while it's forming the egg: https://vimeo.com/86122048 https://vimeo.com/86122048 Birds are surprisingly complex biological factories - especially the bits of their internal 'production line' which rotate the egg-to-be to twist membranes into shock-absorber-like suspension structures for the yolk.