It would be weird enough as a duck-like, egg-laying mammal, but did you know the male platypus has a poisonous spur? That’s right, it’s also part scorpion. But that’s not even the weirdest part. It can use its bill to detect electrical signals. You get that? It’s a badger duck scorpion with built in radar. As is, it’s already qualified to enter Xavier’s School for Gifted Youngsters, but further analysis of its genome shows it actually has genes previously thought to only exist in birds, amphibians, and fish. And it has ten sex chromosomes; Science! hasn’t even determined how it keeps things straight.
There are many evolutionary theories on the platypus, but the most popular are that it was made in a lab by a mad scientist or it crashed landed in some sort of spaceship. Science! will continue to keep a sharp eye on it, though, because if it evolves high-intelligence, it would probably be the doom of the human race… and one would just assume by that point it would also have developed the ability to shoot laser blasts from its eyes.