In the early 2000s, a geology major went on a field trip to the world’s largest open pit coal mine in Colombia. He picked up a piece of rock and noticed impressions of some prehistoric leaves on it. Years later, a paleontologist saw an image of this "branch" and knew it wasn't a branch at all but a fossilized jawbone of an animal! A whole group of scientists arrived on the spot to confirm the finding was actually a part of Titanoboa. It was thriving around 60 million years ago, 6 million years after Tyrannosaurus-Rex roamed the planet.