Paleontologists in North Texas say they've discovered the skull of a young dinosaur that was found near where an adult specimen was unearthed in 2006.
The Perot Museum of Nature and Science in Dallas says the skull was found last year in Alaska, north of the Arctic Circle, but its discovery wasn't announced until Thursday.
Paleontologists say the finding is significant because it reveals dinosaurs tens of millions of years ago were reproducing in a climate once considered too harsh for survival.
The discovery of the adult lead to the establishment of a new species called Pachyrhinosaurus perotorum, named in recognition of the family of H. Ross Perot for its financial support of the museum. Perot is the billionaire Texas businessman who ran unsuccessfully for president in 1992.