Dinosaurs embryos 'ridiculuous'

"These animals do not have any teeth, and since they are ready to hatch, that is strange," said Robert Reisz of the University of Toronto at Mississauga in Canada, who led the study.

"The only explanation for that is they must have been fed by the mother. That would be oldest evidence of parental care in the fossil record," Reisz added in a telephone interview.

"We are looking at the very beginning of dinosaur evolution."

"It does support the idea that parental care and possible altricial (helpless) young existed throughout the reign of the Dinosauria," paleontologist Jack Horner of the University of Montana agreed in an e-mail.

Read more here and here.