Keywords: dinosaurs nature exhibits smithsonian probably public domain probablypublicdomain SI Neg. 86-3346. Date: 1986...Dinosaur Skull, National Museum of Natural History ..Credit: Chip Clark (Smithsonian Institution) SI Neg. 86-3346. Date: 1986...Dinosaur Skull, National Museum of Natural History ..Credit: Chip Clark (Smithsonian Institution) |