A huge fossil site in central India has revealed 92 dinosaur nests and 256 eggs, making it one of the largest hatcheries ever found. The site dates back to the Late Cretaceous and is linked to titanosaurs, those long-necked, plant-eating giants that once roamed the Earth.
According to research published in PLOS ONE, the sheer number of nests suggests this was a major breeding ground, possibly used by several species at once. Scientists studied the area between 2017 and 2020 and identified six different types of eggs. That detail matters because it hints that multiple titanosaur species may have returned to the same place to lay their eggs, something that is still not fully understood in dinosaurs.
A Crowded Nesting Ground Full Of Giant Eggs
The numbers alone are striking: 92 nests and 256 eggs spread across the site. As reported by CNN, paleobiologist Darla Zelenitskysaid the landscape would have been packed with nests, likely an impressive and maybe chaotic scene during the Cretaceous. With so many nests close together, it is hard to imagine how these enormous dinosaurs moved around without stepping on their own eggs.
That detail has led researchers to think the site was used repeatedly, though it is still unclear if all the nests were active at the same time or built over a much longer period.
The discovery of six distinct egg types adds another layer. It suggests different species shared the same nesting area, which is not something the fossil record often shows this clearly.
“Dinosaur eggs aren’t very common in the fossil record, and this may be because of how they evolved. A recent paper suggested that some ornithischians, a group of dinosaurs containing ankylosaurs, stegosaurs and Triceratops, may have had soft shelled eggs,” noted paleontologist Susannah Maidment.
Little To No Parenting After The Eggs Were Laid
One thing that stands out is what is missing: no adult bones and no baby dinosaur remains. As a statement from the Natural History Museum in London indicated, Maidment added that titanosaurs likely laid their eggs and then left them behind.
“While there are fossils of some dinosaurs, such as the meat-eating theropods, where parents are preserved sitting on a nest, there is no evidence of that kind of behaviour in the sauropods. It looks like sauropods laid their eggs and then left their offspring to fend for themselves.”
The eggs were probably buried in shallow pits and covered with sand or sediment. Heat from the sun and the ground would have done the rest, incubating the eggs without any need for parents to stay nearby. It is a strategy seen in some modern reptiles. For Guntupalli Prasad from the University of Delhi, the area may have been used only for nesting and not for living.
“From a theoretical point of view, it could be possible that this area was only for nesting and not for habitation purposes,” Prasad indicated in an email to Gizmodo. “From a taphonomic (preservation) point of view the bones could not get preserved, or are deeply buried or still unexposed and yet to be discovered.”
A Strange Egg Connects Dinosaurs To Birds
Among all the fossils, one discovery really stood out: an egg inside another egg, known as ovum-in-ovo. This phenomenon has been observed in birds before, but never in dinosaurs.
Per PLOS ONE, this could mean titanosaurs had a bird-like reproductive system, laying eggs sequentially rather than all at once like crocodiles. It may seem like a small detail, but it significantly changes how scientists understand these animals.
“We think that sauropods like the titanosaurs lived in herds because of their preserved footprints and trackways, and it seems that they also nested together as well, like some birds,” added Maidment. “Their strategy of laying a lot of eggs packed densely together is not one commonly associated with parental care.”
At the same time, other features such as the random spacing of eggs and the likely marshy environment are more similar to crocodile behavior. Titanosaurs therefore appear to fall somewhere in between.Zelenitsky also noted that discoveries of this scale are still surprising today, continuing to reshape what scientists thought they knew about dinosaurs.
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