Behold the platypus - nature's own Frankenstein experiment! While other animals picked ONE evolutionary trait and stuck with it, the platypus said "I'll take your ENTIRE inventory!" It's like if five different animals merged into a superhero robot, but instead of saving the world, they just confuse biologists. The platypus breaks every rule in taxonomy's book - it's a mammal that lays eggs, has a duck bill, beaver tail, otter feet, AND produces milk. Darwin probably threw his notes in the air when he first saw this creature. Nature's ultimate flex against anyone trying to categorize it!