The eggshell was incredibly thick. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. About 90 million years ago, a giant turtle in what is now ...

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 ...