CHI2000011304 - 13 JANUARY 2000 - CHICAGO, ILLINOIS, USA: University of Chicago paleontologist Dr. Paul Sereno stands in front of an adult and juvenile Jobaria, a primitive long-necked dinosaur, shown at the first-ever public display of dinosaur giants of a previously undiscovered nature January 13. the adult, left, and juvenile Jobaria tiguidensis, weighed an estimated 40,000 pounds and grew to an estimated lenght of 70 feet. Believed to have lived over 135-million-years ago, Jobaria is representative of a unique lineage of dinosaurs that survived and flourished only in Africa. jr/raf/Ray Foli UPI