The researchers found 70 million years old nest full of baby dinosaur remains protoceraops.
The nest 15 Andrew Young dinosaur Protoceratops give clues to the behavior of the dinosaurs' as soon as possible.
Although many eggs have been associated with other dinosaurs, such as eating meat or some hadrosaurs Oviraptor duck-billed, the youngest in the same nest Dino is quite rare.
"For my part, can not think of another dinosaur model that preserves 15 young in the nest in this way," said lead author Dr. David Fastovsky of the University of Rhode Island Department of Geosciences.
The group's findings are presented in the Journal of Paleontology.
Fastovsky and colleagues analyzed the remains of dinosaurs with the nest, measuring about 70 centimeters in diameter and had round bowl. All were found in the Djadochta training Tugrikinshire, Mongolia, where it is believed that the sand "quickly overwhelmed and buried," the young, while they were still alive.
The researchers conclude that the dinosaurs 15 show all properties of youth. These include short snout, relatively large eyes, and an absence of adult attributes, such as protruding horns and frills associated with large adults of this species. At least 10 of all 15 fossil is complete.
Nest and its contents Protoceratops means that young people stayed and grew up in their nest for at least the early stages of postnatal development. Nest in turn means that the care of parents.
A large number of children, however, also suggests that young dinosaurs, mortality was high, except for predation, but also potentially stressful environment.
"Large switch may have been a way of ensuring the survival of animals that setting - although there was a lot of parental care", says Fastovsky. "Mongolia has been, then place a wide variety of theropod dinosaurs, some of whom may be children to eat like this."
"The most obvious of these, found in the same deposits, is (in) famous Velociraptor, a small theropod comfortable with bad breath, where the babies as they have done a good good good," says it.
Yet another discovery previously found in one place is the famous "fight against the dinosaurs" model, where a Velociraptor and Protoceratops appears to have been kept together "locked in what was apparently a mortal combat," said Fastovsky. Parents and other adults of the species of sheep-sized herbivores may then have spent most of their time fighting to avoid such a hungry predator.
Day and night hunter
In a separate study, Dr. Lars Schmitz UC Davis Department of Evolution and Ecology, and colleagues studied the bones around it would have been in the eyes of Protoceratops and other dinosaurs.
The results have allowed Schmitz and his team to conclude that this dinosaur plant eaters and are more active day and night. VelociRaptor, on the other hand, was primarily a nocturnal predator, such as night raids on nests protoceratops must have occurred in the Late Cretaceous.
Although the dinosaurs and children to their parents "had a good sense for notification on the closure of predators, the success rate of a night attack may be more than one attack during the day," says Schmitz.
Given the opportunity, and literally biting the dust (sand) or become dinner, it is not surprising that some small dinosaurs had many children.
"This story is definitely not your parents, living dinosaurs in the Cretaceous-steam-lush jungle that was in vogue a generation or two," says Fastovsky. "Now we know that dinosaurs lived everywhere and" n has almost everything on earth. "
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Posted by Dinosaurs World at 9:53 PM