Researchers have discovered dozens of dinosaur footprints on a boulder that’s on display at a high school in Queensland, Australia. Paleontologists use advanced 3D imaging and light filters to study the rock’s surface. They found 66 fossilized footprints from 47 different dinosaurs. The footp rints date back about 200 million years ago. The researchers say they belong to small dinosaurs with legs ranging from six to 20 inches. ...read more read less