New discovery reveals why dinosaurs reached massive sizes

New discovery reveals why dinosaurs reached massive sizes

Long-necked sauropods ruled the land during the Jurassic and Cretaceous ages. These plant-eating giants appeared on every continent and grew to sizes no other land animal has matched. A key reason for their size was a clever breathing system. This system relied on air sacs that made their bones lighter without losing strength. Air sacs, also found in modern birds, helped sauropods take in more oxygen and keep their bodies cool. These features we…