The platypus is definitely a unique mammal. Not only does it resemble a duck, beaver, and otter, all at once, but it is also one of only two mammals that lay eggs. Don’t be distracted by their quirky nature, though—these beaked beauties can cause some serious damage. Male platypuses have poisonous stingers on their back feet and they’re not afraid to use them.
Reuters/Corbis, Mick Tsikas