Is it possible to know all the details of ancient animals and plants? Objective Recognize that because some plants’ and animals’ parts fossilize better than others this creates missing information in the fossil record. Background Teachers should read and review information in A Fossil’s Journey with students. Teachers should print off the Horse Skeleton Illustration . Teachers should print off the Stegosaurus Skeleton Illustration . Preparation Materials Horse skeleton diagram Stegosaurus skeleton diagram Drawing/coloring utensils Set up Ask students to name all the facts they know about horse Duration: 60 Minutes Additional Standards: 3rd Grade: 3-LS4-1, 3-LS4-2, and 3-LS4-3.