Nizar Ibrahim

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About

Nizar Ibrahim is a paleontologist renowned for his groundbreaking work on Cretaceous-era vertebrates from North Africa, particularly the Kem Kem Group of Morocco. His research focuses on the paleoecology, functional morphology, and evolutionary biology of dinosaurs and other extinct reptiles. Ibrahim’s most cited paper, "Tail-propelled aquatic locomotion in a theropod dinosaur" (2020, 94 citations), challenges long-held assumptions about dinosaur lifestyles by providing compelling evidence that the giant predator Spinosaurus was a specialized aquatic swimmer, using its paddle-like tail for propulsion. This work, which involved detailed anatomical analysis and computational modeling, reshaped our understanding of dinosaur ecology and behavior. Beyond this, Ibrahim has led expeditions that uncovered some of the most complete Spinosaurus specimens, revealing a bizarre, crocodile-like body plan. His contributions have earned him recognition as a National Geographic Explorer and a leading voice in vertebrate paleontology. With over 1,000 citations across his publications, Ibrahim’s research continues to inspire new questions about how dinosaurs diversified into extreme aquatic niches, making him a pivotal figure in modern paleontology.