From "Science" Magazine's 2008 Scientific Highlights:
Dutiful Dinosaur Dads
In more than 90% of living bird species, males play a role in the parental care of their offspring. By comparison, males contribute to parental care in fewer than 5% of mammalian species...Varicchio et al present compelling evidence that in three species of dinosouars...males were the individuals responsible for caring for eggs and young.
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