Fossils are the remains of prehistoric organisms that have been preserved in the earth’s crust, and have remained there since prehistoric times. Fossils have helped to give us insight into how creature from the distant past looked, moved, ate, grew, interacted with one another, and many other interesting and fascinating aspects of their behavior. During the 17th a man named Nicholas Steno wrote a book called “Forerunner to a Dissertation on a solid naturally enclosed in a solid”, in this book Steno discussed the differences between object formed within rock like crystals and object formed outside of rock, like fossils. Steno’s book was not very popular, and was not accepted by the scientific community of his time period, because they could