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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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Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian
![Ed Yong on Twitter: "@FelicityMorse Also, it has a four-headed penis https://t.co/fLDGsjwGgf" / Twitter Ed Yong on Twitter: "@FelicityMorse Also, it has a four-headed penis https://t.co/fLDGsjwGgf" / Twitter](https://pbs.twimg.com/media/Ca7LkYDW4AAHCdb.jpg)
Ed Yong on Twitter: "@FelicityMorse Also, it has a four-headed penis https://t.co/fLDGsjwGgf" / Twitter
![What if you had a 4-Headed Penis like the Echidna? Do you want a Giant Electric Blue Penis like the Leopard Slug? Here's some of the Weirder Penises in the animal kingdom - What if you had a 4-Headed Penis like the Echidna? Do you want a Giant Electric Blue Penis like the Leopard Slug? Here's some of the Weirder Penises in the animal kingdom -](https://i2.wp.com/jobbiecrew.com/wp-content/uploads/2020/11/0pennn.jpg?ssl=1)