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Anne Hilborn on Twitter: "To deal with the female's bifrucated reproductive system, male opossums have a forked penis #mammalfacts https://t.co/viju2ShLqY" / Twitter
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Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian
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Unmeshed split-thickness SKIN grafts for penile plastic in patients with paraffinoma - ScienceDirect
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