Platypuses are egg-laying mammals, and their newborns, called puggles, are extreme. They have to try and survive in the wild with their limited abilities. With teeny-tiny, blind eyes, a hairless body, a flat head, and short, smooth hair, they rely on their mother’s milk for nourishment. When they’re babies, they can’t swim, even though they grow out of that as they get older. The male baby platypuses are venomous and are only one of six mammals on the planet. They have a stinger in the back of their legs that secretes their venom. The babies don’t have stomachs, thanks to their limited dietary needs (AZ Animals).