Dinosaurs became giants — so why did they never become tiny?
A new study suggests that dinosaurs did not evolve to be tiny because they were outcompeted by early small mammals for ecological niches. This research highlights how inter-species competition may have imposed a lower size limit on dinosaur evolution.
Dinosaurs are often remembered for their enormous size. Tyrannosaurus rex was an imposing predator, while dinosaurs such as Apatosaurus reached truly massive proportions. Yet new research suggests that one of the most intriguing questions about dinosaur evolution lies at the opposite end of the size spectrum: Why did dinosaurs apparently never become extremely small?
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