Bistahieversor sealeyi skull. Collage depicts its excavation from the Bisti Wilderness Area in New Mexico in 1996.
Researchers scanned the skull of a more than 70-million-year-old tyrannosaur, dubbed the Bisti Beast, from the Bisti Badlands in New Mexico, at Los Alamos National Laboratory—the largest item to have ever undergone neutron and X-ray CT scans at the Laboratory.