![CVE on Twitter: "Scientists unravel mystery of echidnas' bizarre 4-headed penis by creating an advanced 3D model of the peculiar organ. Their sperm have the astonishing ability of being able to work CVE on Twitter: "Scientists unravel mystery of echidnas' bizarre 4-headed penis by creating an advanced 3D model of the peculiar organ. Their sperm have the astonishing ability of being able to work](https://pbs.twimg.com/media/E4YmpDaXoAIM-hz.jpg)
CVE on Twitter: "Scientists unravel mystery of echidnas' bizarre 4-headed penis by creating an advanced 3D model of the peculiar organ. Their sperm have the astonishing ability of being able to work
![Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article5919135.ece/ALTERNATES/s615/Long-beaked-echidna.jpg)
Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online
![Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian](https://i.guim.co.uk/img/media/3559d0d68afaf94e75bf51143509274fefffafc5/0_138_4372_2622/master/4372.jpg?width=1200&height=1200&quality=85&auto=format&fit=crop&s=688fe7ca1639c1e9e95ba0ed6f04c9e2)
Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian
![Colin Christian on Twitter: "Echidnas are Monotremes,one of two mammals that lay eggs. They also have a four headed penis. Look at that smile! https://t.co/pLAweboNN3" / Twitter Colin Christian on Twitter: "Echidnas are Monotremes,one of two mammals that lay eggs. They also have a four headed penis. Look at that smile! https://t.co/pLAweboNN3" / Twitter](https://pbs.twimg.com/media/ChBEC8SUcAENHe7.jpg)
Colin Christian on Twitter: "Echidnas are Monotremes,one of two mammals that lay eggs. They also have a four headed penis. Look at that smile! https://t.co/pLAweboNN3" / Twitter
![Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article5919136.ece/ALTERNATES/s615b/Long-beaked-echidna.jpg)
Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online
Mental Floss on Instagram: “Most of the time, an echidna's penis is tucked safely inside its body, keeping itself clean and leaving unsuspecting passersby to assume it…”
![Echidnas' 'bizarre' mating no longer obstacle to successful breeding program | Animal welfare | The Guardian Echidnas' 'bizarre' mating no longer obstacle to successful breeding program | Animal welfare | The Guardian](https://i.guim.co.uk/img/media/330c833d453a01154ddfe4b3f8c7f2a61ba9d206/0_0_517_310/master/517.jpg?width=1200&quality=85&auto=format&fit=max&s=630d5e8bbc57494b3305f417b7e1cfea)