I assume you mean the evolution of our species. It is really exciting as new discoveries are always being found and they regularly change the text books! You have to be a jack of all trades, studying anthropology, archaeology, geology, geomorphology, biology, genetics, psychology, sociology, philosophy, climatology, ethnography, ecology, history… The list goes on! That’s the thing I love most about it! You need to be able to think scientifically, but also use your imagination. There are no right and wrong answers like in many other sciences as no one will ever know the truth we can just use all the available evidence and interpret it through our present knowledge.