The meat-eating dinosaurs known as theropods that roamed the ancient Earth ranged in size from the bus-sized T. rex to the smaller, dog-sized Velociraptor. Scientists puzzling over how such wildly different dinosaur sizes evolved recently found—to their surprise– that smaller and larger theropod dinosaurs like these didn’t necessarily get that way merely by growing slower or faster.
Click here for original story, Evolution of dinosaur body size through different developmental mechanisms
Source: Phys.org