Incredible Fossil Find: Dinosaur Eggs with Embryos Preserved for 70 Million Years
Argentine scientists have made a fascinating discovery in the southern province of Neuquen. They have found fossilized dinosaur eggs that contain embryos inside, estimated to be around 70 million years old. Claudia Della Negra, the director in charge of cultural heritage of Neuquen province, reported that the fossils are similar to other fossil eggs found in a different part of the province. At present, archaeologists are studying the embryo, teeth, and skin of these fossilized dinosaur eggs.
The Neuquen provincial government plans to construct a paleontological park to preserve the local archaeological heritage. This initiative has received support from the National Geographic Institute, the National Scientific and Technical Research Council of Argentina, and the Spanish province of Zaragoza.
Dinosaur eggs usually measure 10-13 cm in length and 5-8 cm in width, while ancient crocodile eggs are no longer than 5 cm. The shells of fossil crocodile eggs are usually hollow or smooth, while dinosaur eggs have a shell with a wavy pattern that looks like winding worms.
The dinosaur eggs unearthed in the city of Presidente Prudente in the state of São Paulo were preserved in a layer of soil that gradually transforms into sandstone over time. The material acts as a natural defense, forming several layers of sand over millions of years, helping to preserve the pests until paleontologists brought them out of the ground last year. However, it was not until December 2021 that they determined the eggs belonged to a dinosaur.
Previously, researchers discovered a dinosaur embryo in excellent condition in China. The embryo, named “Baby Yingliang”, is curled up inside a fossil egg in the rock layer of the Heikou Formation at the Shahe Industrial Park in Ganzhou City, Jiangxi Province. This specimen is one of the most intact dinosaur embryos known, closer to a bird embryo than a dinosaur.
In particular, Baby Yingliang is close to hatching; its head is tucked under its body, its back is folded, and its feet are placed on its sides. A team of paleontologists led by the University of Birmingham says that Baby Yingliang belongs to a species of theropods with beaks but without teeth called “oviraptorosaurs”. Their embryos are 27 cm long from head to tail and are coiled inside a 17 cm long egg.
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