10/14/2026
Happy National Fossil Day! 🦴
Did you know that Arizona's state dinosaur is the Sonorasaurus, which was discovered in 1994 by University of Arizona student Richard Thompson? 🦕
During the time of Sonorasaurus, about 100 million years ago, the Sonoran Desert was near the edge of an inland sea that stretched from the Gulf of Mexico to the Arctic Ocean. Flowering plants and trees had only recently evolved and taken up residence among conifers, ferns and cycads rather than saguaros and palo verdes.
🌎 Experience a piece of Arizona's prehistoric past and continue the celebration of Earth Sciences week with us by speaking to one of our Earth Scientists or docents at our Earth Sciences exhibit today through Saturday, between 9:00 a.m. and 11:00 a.m.