It is hard to identify the behavior of creatures just from their fossils. An international team of paleontologists tried just that on a big group of dinosaur fossils from Argentina. Their Mussaurus specimens included developmental stages from egg through juveniles to adults. Clues from the 100 eggs and 80 specimens suggested to this team that these dinosaurs had social behaviors.

What are the odds that a buried animal would still have intact DNA after 125 million years? Researchers publishing in the journal Communications Biology said exactly that.¹ But it’s what they elected not to say that tells just as big a story.