May 29 : Tyrannosaurus rex possessed a preposterously massive skull - 5 feet long (1.5 meters) and built to enable bone-crunching bite force - but presented preposterously puny arms. And many other meat-eating dinosaurs shared this mismatched combination of traits. So how did this come to be?Researchers study

Scientists may have uncovered why T

Un hallazgo reciente plantea cómo los grandes depredadores desarrollaron cabezas y mandíbulas más poderosas priorizando la eficacia frente a grandes presas