Similarities to the womb and placenta of female mammals indicate a response to common evolutionary challenges in pregnancy.

You might think you know why the platypus is a bizarre beast. Maybe you know that it lays eggs, that the males have venomous spurs on their ankles, and that it can sense electricity with its bill. But ...

In our complete guide to bird lifecycles, we lead you from nesting and hatching all the way back to the mating season.

Native to the rivers and freshwater creeks of eastern Australia, its venom is the lesser-known feature that sets the platypus ...

Learn more about the prehistoric crocodile species that may have hunted prey like modern-day leopards, from the trees rather ...