Parasite may have felled a mighty T. rex

Skull holes in several dinosaur specimens are consistent with those found in diseased birds

Talk about a cold case. The culprit behind a 67-million-year-old murder may be exposed at last. A common avian parasite may have brought down one of the world’s most famous Tyrannosaurus rex dinosaurs, a study appearing online September 29 in PLoS ONE suggests.