ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by @paoloverzone / Frozen in time, this fossilized bird's egg was found in what is now Nebraska. It was laid after the extinction of most dinosaur groups, but even so, the remains help Yale Ph.D. student Jasmina Wiemann study the chemistry of more ancient dinosaur eggshells. "Birds are also dinosaurs, so it is also an avian dinosaur egg," she says. Follow @paoloverzone for more photos and stories. Check out Nat Geo's link in bio for more on this story.」10月8日 19時38分