Copper: It was the New Sterling. Or was it?
But who doesn't love copper?
Nobody from Michigan
Who DOES love copper?
Octopus blood contains the copper-rich protein hemocyanin for transporting oxygen.
Although less efficient under normal conditions than the iron-rich hemoglobin of vertebrates,
in cold conditions with low oxygen pressure, hemocyanin oxygen transportation is more efficient than hemoglobin oxygen transportation.
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