From the National Geographic:

“Breathtaking” Nest

A nest full of fossilized dinosaur babies has been discovered in Mongolia, and the find has paleontologists reexamining styles of parental care among the ancient reptiles.

The approximately 75-million-year-old nest shows 15 juvenile members of Protoceratops andrewsi—a relative of Triceratops—entombed in ancient sand dune deposits. The nest was recently discovered by Mongolian paleontologist Pagmin Narmandakh in the region’s Djadokhta formation.