How Birds Get Oxygen Inside Their Eggs

(YouTube link)

Birds, along with mammals and everything taxonomically above anaerobic bacteria, require oxygen to live. When a bird lays an egg, it contains everything necessary to build a new bird -except a steady supply of oxygen. How nature works around that imitation is both ingenious and complicated. This video from NPR's Skunk Bear is a lot more interesting than you'd think from just the title. via Boing Boing


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