Platypuses lay eggs and produce venom like some reptiles, but they sport furry coats and feed their young with milk like mammals. The odd creatures are classed as monotremes, with only one close relative – the echidna.
But as primitive mammals that share the same ancestor as humans, a study of the animal's genome can improve biologists' understanding of how mammals evolved, while illuminating the platypus's strange physiology. Full story HERE.