They found that the tail generated eight times more thrust in the water than the tails of two other theropods — Allosaurus and Coelophysis, a small Triassic carnivore. Scrolling is acceptance of our, Galloping Starfish and their army of sniffing, tasting, gripping tube feet, Annie and Grinnell, UC Berkeley’s Peregrine Falcon Parents, The Fish That Walk on Land, an animated introduction to amphibious fish. They were wrong. With a Bachelor of Arts in Professional Writing and several years experience under his belt, he joined New Atlas as a staff writer in 2016. Spinosaurus aegyptiacus remains were first discovered about 100 years ago in Egypt, and were moved to a museum in Munich, Germany. While other ancient creatures, such as the plesiosaur and mosasaur, lived in the water, they are marine reptiles rather than dinosaurs, making Spinosaurus the only-known semi-aquatic dinosaur. OFFER: Save 45% on 'How It Works' 'All About Space' and 'All About History'! Future US, Inc. 11 West 42nd Street, 15th Floor, Spinosaurus is an absolute beast of a predator, estimated to have been up to 18 m (59 ft) long and weighing over 20 tons. It is estimated to be 15 metres (49 feet) long. Commenting on the research, Prof Paul Barrett, from London's Natural History Museum, said: "The idea that Spinosaurus was aquatic has been around for some time and this adds some useful new evidence to address that issue. Researchers tested the swimming potential of the Spinosaurus tail shape by comparing it to the tails of two terrestrial dinosaurs, two semiaquatic tetrapods and a physical control. Groundbreaking Spinosaurus Discovery Just Made It The First Known Swimming Dinosaur . They lived in the Triassic period probably like seals of today live. The hind limbs were shorter than in other predatory dinosaurs, the foot claws were quite wide and the feet almost paddle shaped. The findings landed with a splash in the paleontological community on Wednesday (April 29). VideoFirst baby male gorilla born at Boston zoo, Lockdown: 'I cycled every street in my 5km radius' VideoLockdown: 'I cycled every street in my 5km radius', The Covid doctor whose dance video went viral. It was a theropod, or part of a group of mostly carnivorous dinosaurs that walked on two legs; and it was around the size of another theropod, Tyrannosaurus rex, with massive projections of its vertebrae towering up to 5.4 feet (1.6 m) above its back. Over 280,000 people receive our email newsletter. Astronomers claimed galaxy was 98% dark matter. Video, Macron leads vigil for beheaded history teacher, Rare green puppy 'Pistachio' born in Italy, The Countdown: Debate masks, Jennifer Lawrence and 60 Minutes, Epstein: Ghislaine Maxwell denies witnessing 'inappropriate' activities, Trump's lawyer Giuliani dismisses 'compromising' clip from new Borat film, LGBT students attacked in university Zoom meeting, Poland abortion: Top court bans almost all terminations, Boris Becker accused of not handing over tennis trophies to pay debts, Why Nigerian protesters want Beyoncé to be more like Rihanna, Asafoetida: The smelly spice India loves but never grew, Coronavirus: France extends overnight curfew as cases surge. He added: "And then we noticed other things. Its vast spiked dorsal sail, though, was probably more useful for attracting mates than aiding swimming. Plesiosaurs came next, living from early Jurassic until the end of the Cretacious period. Importantly, land-dwelling dinosaurs only account for less than one percent of the remains at one site and 5.6 percent at another. "One of the things about this paper that struck me as particularly neat was the suggestion that Spinosaurus was a quadruped - all other meat-eating dinosaurs were bipeds. Or learn that most of the huge swimming monsters we know of were sea reptiles and not dinosaurs. The remaining specimen was missing much of the tail and vertebral sections. 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"This discovery is the nail in the coffin for the idea that non-avian dinosaurs never invaded the aquatic realm," Nizar Ibrahim, a paleontologist at the University of Detroit Mercy and the lead author of the new study, said in a statement. For a limited time, you can take out a digital subscription to any of our best-selling science magazines for just $2.38 per month, or 45% off the standard price for the first three months.View Deal. I wonder what ate 'em. Subscribers get more award-winning coverage of advances in science & technology. The results are fully consistent with the idea of a truly water-dwelling, ‘river monster’.". Why are there oyster shells in the ‘Chalk Pyramids’ of Kansas? Here are a few of them. • What are mosasaurs? Please refresh the page and try again. Discover world-changing science. They were powerful swimmers that had four paddle-like limbs on a long, streamlined body. This award-winning video collection is reader-supported. "But finding a more complete skeleton after the best material was destroyed in a WW2 bombing raid is significant, and this has allowed some surprising things to be found out about this animal.