1. Fossils are important because they provide a visual, physical, and the genetic record of plants, animals, bacteria from different eras in Earth's history. They not only provide a picture of a long-distant past, but also information that can be used to understand the evolution of today's plants and animals and clues for the future of our planet. Studying fossils helps people understand where humans came from and what kinds of environments aid genetic change. It gives us a picture of evolution by showing the incremental changes in species throughout time, and helps us understand the immensity of geological time. <br />Thanks April, and yes most fossils are found in sedimentary rocks. How do sedimentary rocks form from igneous rocks?<br />