
Paleontologists Unearth the World’s First Dinosaur Egg Containing Another Egg
Key Points:
- A fossilized dinosaur egg with a second egg inside, exhibiting an ovum-in-ovo structure, was discovered in central India, marking the first confirmed case of this anomaly in dinosaurs, specifically titanosaurs from the Late Cretaceous period.
- The finding, led by University of Delhi's Guntupalli Prasad, challenges the previous belief that ovum-in-ovo conditions occur only in birds, suggesting reproductive similarities between titanosaurs, crocodiles, and modern birds.
- The 68-million-year-old egg from the Lameta Formation shows two distinct eggshell layers, indicating a backward movement of an almost complete ovum into the oviduct, a reproductive trait previously known only in birds.
- This discovery implies that titan




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