Value Beyond Measure
Photograph by Robert Clark
Cracked open, the gray shell of a dinosaur egg from the Patagonian site of Auca Mahuevo cradles a tan, inch-long fossilized skull that still preserves a tiny eye socket after 80 million years. "This is an incredibly rare find," says paleontologist Luis Chiappe, co-director of the excavation. "It's one of the key specimens indicating that the dinosaurs here were titanosaurs." So many eggs have been discovered at the sitehundreds of thousands and countingthat this one could be sacrificed to study its contents.