Evolutionary Biology is defined in the following quote: "The branches of biology that deal with the processes of change in populations of organisms, especially taxonomy, paleontology, ethology, population genetics, and ecology". Evolutionary Biology is related to other areas of biology, and it is a rapidly growing subject for study. Increasingly advanced and fast-moving technology assists us in learning about the history of the earth and life on it. Many long term research projects are extending over decades in this fascinating subject. Biologists research and study biodiversity and evolution from pre-historic days to now. Studying evolution can help us to understand the history of life. Studying the historical functions of plants, fungi, bacteria and animals helps us understand their past and present environmental relationship. Evolutionary biology explores the evolutionary processes that produced life on earth, the origin of species through natural selection and genetic variation and the descent of species and origin of new species. Evolutionary biology has many practical applications, not least in species conservation.