Dale Russell
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Dale A. Russell is a geologist/palaeontologist, currently Research Professor at The Department of Marine Earth and Atmospheric Sciences (MEAS) of North Carolina State University. Dinosaurs he has described include Daspletosaurus and was the first to suggest an extraterrestrial cause (supernova, comet, asteroid) for the extinction of the dinosaurs. He is also credited with inventing the controversial dinosauroid thought experiment.