Specimens of Tyrannosaurus and colleagues announced the recovery of soft tissue from the marrow cavity of a fossilized leg bone (a 1.15 m long femur), from a 68-million-year-old "Tyrannosaurus". The bone had been intentionally, though reluctantly, broken for shipping and then not preserved in the normal manner, specifically because Schweitzer was hoping to test it for soft tissue. Designated MOR 1125 (and known informally as B-rex), the dinosaur had been excavated from the Hell Creek Formation. Flexible, bifurcating blood vessels and fibrous but elastic bone matrix tissue were recognized. In addition, microstructures resembling blood cells were found inside the matrix and vessels. The
Moore v. Regents of the University of California because of the potentially fatal amount of swelling in Moore's spleen. Moore signed a written consent form, authorizing the procedure. It said the hospital could "dispose of any severed tissue or member by cremation," and his spleen was removed by surgeons, who were not named as defendants, at UCLA Medical Center. Moore's blood profile returned to normal after only a few days, and further examination of his spleen led Golde to discover that Moore's blood cells were unique in that they produced a protein that stimulated the growth of white blood cells, which help to protect the body from infections.