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Study: Lizards breathe more efficiently than humans do

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Little-known fact: When it comes to extracting oxygen from the air we breathe, we humans are just OK.

Birds are more efficient breathers than we are. So are alligators and, according to a new study, monitor lizards, and probably most dinosaurs were as well.

Humans are what are called tidal breathers. When we breathe in, fresh air moves into our lungs along progressively smaller airways, eventually ending in little sacs called alveoli, where our bloodstream picks up oxygen and deposits…

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