7 Animals That Break The Rules Of Science Share PINTEREST Email Print Liveabout Humor Political Humor Web Humor Weird News Paranormal & Ghosts Urban Legends UFOs Entertainment Hobbies Activities By Jessica Spar is a writer and social media editor. our editorial process Jessica Spar Updated January 30, 2020 It's official. Science is officially broken. A warm-blooded fish has been discovered, so that's pretty much the last straw. These animals basically prove that everything you ever learned in biology class is wrong. 01 of 07 The fish that doesn't lay eggs Rich Lewis/Getty Images The seahorse is classified as a fish but actually gives birth to its young. And what's even crazier? The men are the ones who get pregnant and give birth. 02 of 07 The mammal that lays eggs Gunter Ziesler/Getty Images The platypus is just an odd animal in general, looking like it has the beak of a duck, the tail of a beaver and the fur of an otter. What's even stranger is that the platypus lays eggs, but also feeds its young milk. The echidna is the only other egg-laying mammal. Most mammals give birth to their young, making these species the odd ones out. 03 of 07 The warm-blooded fish Gregor Schuster/Getty Images The opah, or moonfish, has been discovered to be warm-blooded. It was previously thought that fish were cold-blooded, and couldn't keep warm independently as mammals can. 04 of 07 The animal that can live forever Mark Conlin/Getty Images The Turritopsis nutricula is known as the "immortal jellyfish," and as suggested by its name, it can pretty much live forever. This species of jellyfish "has been deemed 'immortal' by scientists who have observed its ability to, when in crisis, revert its cells to their earliest form and grow anew." So now they can sting you and live forever. We predict a world takeover someday... 05 of 07 The fish that are all born male Dave Fleetham/Design Pics/Getty Images According to National Geographic, "all clownfish are born male. They have the ability to switch their sex but will do so only to become the dominant female of a group. The change is irreversible." Now those are some interesting powers to have. 06 of 07 The group of mammals with two uteri Jose Francisco Arias Fernandez/EyeEm/Getty Images Enter the female marsupial. If you thought every mammal just had one set of reproductive organs, you were wrong. Female marsupials have two uteri, each with its own vagina. Young are born from a central birth canal. 07 of 07 The mammal with the longest pregnancy ever Buena Vista Images/Getty Images Women, when you're moving towards month eight of pregnancy and you think you have it bad, just think of the African Elephant and you'll feel much better. Pregnancy lasts for twenty-two months for these animals. That's almost two years! That's got to be some kind of cruel biological joke.