Tableau
Dinosaur fossils are disproportionately found in one dramatic posture: head thrown back, tail extended, mouth open wide. Paleontologists call it the opisthotonic death pose, and no one is entirely sure what causes it.
The leading candidates are muscle spasms during the animal's death throes, or the slow contraction of neck ligaments after death — a process that may be helped along if the body ends up submerged in water, as many fossil-bearing remains did.
Based on a post on Futility Closet.