Crystal-filled dinosaur eggs rewrite fossilisation stories in China
Two spherical dinosaur eggs from eastern China were found with interiors filled by calcite crystals rather than bones, a rare mineral replacement that preserves internal voids as geometric crystal patterns. The Anhui eggs belong to a new oogenus, Shixingoolithus qianshanensis, while a Ganzhou Basin find yielded hadrosauroid embryos, offering clues about late Cretaceous reproduction and the environmental conditions that drive such preservation near the Cretaceous–Paleogene extinction.
