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How Birds Get Oxygen Inside Their Eggs

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A beautiful tour of the bizarre system that keeps chicks from suffocating before they hatch. ↓↓ Links & Info ↓↓ SUBMIT A QUESTION HERE: http://www.npr.org/skunkbear SUBSCRIBE: http://bit.ly/2dH6fpR TUMBLR: http://skunkbear.tumblr.com/ FACEBOOK: https://www.facebook.com/...