The majority of dinosaur fossils that have been found are bones, but they also include eggshells, tracks, skin imprints, fossilized feces, and stomach stones. The term dinosaur was originally coined in 1842 by British comparative anatomist Richard Owen from the Greek words for “terrible” and “lizard.” This association with reptiles was generated from the early study of fossilized bones and from the understanding that dinosaurs produced their young in the form of hard-shelled eggs. However, many more recent researchers have postulated that dinosaurs are actually ancient ancestors of birds, drastically changing the common perception of these intriguing animals.