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Cold feet - so what

Have you ever seen a bird whose foot was surrounded by a layer of ice? When you zoome in, you can see it better.
Birds have a so-called "miracle ne...
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Have you ever seen a bird whose foot was surrounded by a layer of ice? When you zoome in, you can see it better.
Birds have a so-called "miracle net" that regulates the heat exchange of their blood in the legs.
Often it is the supposedly everyday that always amazes me.
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