Before Sunset: Ice-Age Amazonian Rock Art and Archaeoastronomy at the Younger Dryas

by Christopher S. Davis

Through a presentation of the oldest rock art dated in the Americas, located in Monte Alegre, Brazil, this book analyzes an ancient ecological-astronomy strategy that theoretically made the rapid human migration in the Americas successful. It helps answer two vital questions long held by scholars and the general public How did humans survive the rapid and massive climate changes at the end of the ice age? And how did founding populations (especially in the Americas) manage successful settlement, relatively rapidly, in ecosystems entirely foreign to them? It further initiates questions about the universal role that astronomy (and even astrology) might have played in cognitive human evolution and the success of burgeoning sedentism and eventual "civilization" throughout the world. The book makes a substantial contribution because of the wealth of cultural information it provides from Monte Alegre. It explains the author's analysis of pictographs, lithics, and landscape modifications that were excavated there and provides novel findings on the chronology and archaeoastronomy of the art.


This book is indispensable for courses about Paleoindians, peopling of the Americas, environmental anthropology, cosmology, rock art studies, archeoastronomy, paleoecology, paleoethnobotany, and Amazonia. The pan-American indications of this work will appeal to archaeologists, historians, art historians, folklorists, Native American and Indigenous scholars, evolutionists, cognitive scientists, geographers, and the general public.

262 pages, Kindle Edition

Published June 20, 2025

About the author

Christopher S. Davis has squandered a good deal of time pondering unanswerable questions. His odd love of quantum physics motivates him to stay current on the latest theories. He is the author of Designed to Evolve, a scientific and spiritual inquiry into the origin of the universe and life.

Christopher is a mechanical engineer and stress analyst by profession. He creates simulations of products yet to be made. In leisure, he enjoys immersing himself in virtual reality games. It is no wonder that he would speculate that the universe is a simulation in his debut novel, Wake from Reality.

As a fifth generation native of the Pacific Northwest, Christopher is a husband, the father of four active boys, and caregiver for two spoiled cats. He is addicted to chocolate and running obstacle course races that are abundant in mud.