Dinosaur Egg Inside Egg Reveals Bird-Like Reproduction in Titanosaurs
CT scans of 11 Late Cretaceous titanosaur eggs from India’s Lameta Formation uncovered a second inner shell inside one egg — an ovum-in-ovo structure previously known only in birds. The dual shells and microstructure indicate sequential egg development within the oviduct, suggesting titanosaurs had segmented oviducts and avian-like reproductive biology, a rare insight since the other eggs showed normal, single-shell architecture.
