sciencehabit writes "Looking a bit like a dolphin, but with a long slim snout filled with pointy teeth, one species of ichthyosaur was practically invisible in the murky depths of Jurassic seas, thanks to dark pigmentation that covered its entire body. That's one conclusion of a new study that provides an unprecedented peek at the coloration of sea creatures alive during or soon after the dinosaur era. The approach involves bombarding fossils with charged particles and then analyzing the particles that are knocked from the surface, which reveals remnants of ancient pigments. Dark pigmentation may have helped ichthyosaurs and other predators camouflage themselves in the murky depths while they hunted prey."
All theoretical chemistry is really physics; and all theoretical chemists
-- Richard P. Feynman