Spinosaurus has long been a superstar among dinosaur fans, with its massive alligator-like body and a huge “sail” of skin running the length of its spine. Though the fossil was unearthed a century ago, scientists hadn’t been able to say exactly what it looked like because only a few bones had ever been found. But new fossil discoveries by National Geographic explorer Nizar Ibrahim will forever change the way we think about Spinosaurus—and all other dinosaurs. For more information on this episode, visit nationalgeographic.com/overheard Want more? Michael Greshko has a lot more to say about Spinosaurus. Take a look at his article full of pictures and animations of what Spinosaurus might have looked like in the water.  Or learn about why dinosaurs went extinct in the first place. You can also make Spinoaurus and other prehistoric creatures appear in your living room by using Nat Geo's dinosaur instagram AR filter. Follow us at instagram.com/NatGeo.  Also explore: Check out our previous episode about the illegal trade of dinosaur fossils in the United States. And for paid subscribers: In our cover story, “Re-imagining dinosaurs,” you can read about how paleontologists are learning more than ever by using advanced techniques like giving CT scans to frozen crocodiles or using lasers to figure out what color Velociraptor eggs were. If you like what you hear and want to support more content like this, please consider a National Geographic subscription. Go to natgeo.com/exploremore to subscribe today.  Learn more about your ad choices. Visit podcastchoices.com/adchoices