''A remnant or a trace of an organism, such as a skeleton or a leaf imprint embedded and preserved in the Earth's crust, are examples of fossil evidence.''
Fossils are left overs from the living organism, both parts of them and traces by them. Fossils are used by scientists to recreate the past of the Earth, the life on it, how did they lived, how did they look, the environment, whole ecosystems...
Answer:
The 'Middle Ages' are called this because it is the time between the fall of Imperial Rome and the beginning of the Early modern Europe. ... The Dark Ages are given this name because Europe was in disarray in comparison to the orderliness of classical antiquity and life was short and poor.