Overview :Astronomers have determined that our universe is 13.7 billion years old. How exactly did they come to this precise conclusion? How Old Is th... Read More
Overview :Explore the beautiful beaches, bays, harbors, marshes, and ponds of Cape Cod and Martha's Vineyard from your kayak. Twenty-five exciting tri... Read More
Overview :The search for life on Mars--and the moral issues confronting us as we prepare to send humans thereDoes life exist on Mars? The question has... Read More
Overview :A Note from the Author: On August 24, 2006, at the 26th General Assembly of the International Astronomical Union (IAU) in Prague, by a majo... Read More
Overview :The only guide dedicated entirely to hiking San Francisco s East Bay has been revised and updated, and features 3 new trips in Contra Costa ... Read More
Overview :Part I: Discovering Extrasolar Planets.- Once Upon a Time.- Pluralism Through Western History.- The Discovery of the Century.- Detecting Exo... Read More
Overview :The best walking and hiking trails in the beloved Massachusetts region Pine forests, windswept dunes, freshwater ponds, salt marshes, and wa... Read More