Text written in Basque and translated automatically by Elia without any subsequent editing. SEE ORIGINAL

A plesiosaur with a calf

after 25 years of storage in a museum warehouse, a paleontologist at Marshall University in the United States studies this particular fossil. It is a fossil of a plesiosaur, an aquatic dinosaur, and it is special because when the animal died it was pregnant, and the skeleton of the puppy has also been fossilized.

It was known that many other aquatic dinosaurs were viviparous, so the fact that the plesiosaur is also the same does not surprise the experts; but the fetus is large, 150 centimeters long (within the mother, 470 centimeters long), and unique. For this reason, experts believe that these aquatic dinosaurs are more likely to care for their offspring in the same way that whales do today.