mammal with the "weirdest" penises in the animal kingdom has baffled scientists. The "very strange and unusual" appendage of the echidna remains a mystery to researchers who still don't understand why it has four heads.
The "very long" phallus makes up a third of the animal's body while erect, is bright red and has four endings, which can all be used for the purpose of reproduction.
An echidna is similar to an anteater but has prickly fur. They live in Australia and Papua New Guinea. University of Queensland researcher Dr Steve Johnston co-authored a study on the peculiar creature's impressive member.
But he said only "the creator God" knows why it is so bizarrely shaped. It may be to please the insatiable female echidna, who scientists.
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