It's hard to know what prehistoric animals' lives were like—even answering seemingly simple questions, like what they ate, can be a challenge. Sometimes, paleontologists get lucky, and pristine fossils will preserve an animal's stomach contents or provide other clues. In a new study in Frontiers in Earth Science, researchers investigating the fossil of a bird that lived alongside the dinosaurs got more questions than answers when they found quartz crystals in the bird's stomach.
source https://phys.org/news/2021-02-quartz-crystals-stomach-fossil-bird.html
