How Dinosaur Footprints Ended Up on a Cave Ceiling Finally Solved

Did dinosaurs, walking on all fours, use their hands to walk across a cave's ceiling? Scientists have been puzzled by these odd fossils for decades. Now thanks to an unlikely clue, we have an answer.
Published: 3:58 AM MST February 18, 2020
Updated: 3:18 PM MST February 17, 2020