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The geese that fly at commercial-jet altitudes
HERE’S THE INTERESTING PART
It turns out your overpriced window seat doesn't even grant you exclusivity in the sky. While you are busy fighting over armrests at thirty thousand feet, flocks of bar-headed geese are casually cruising right outside. These avian overachievers possess highly specialized hemoglobin allowing them to absorb oxygen in the death zone over the Himalayas while you complain about the weak cabin WiFi.
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