Thousands of years ago, a swath of land along what is now the western coast of England served as a superhighway for humans and animals alike. Today, the ebb and flow of each passing tide reveals more of the ancient footprints that these long-gone travelers stamped into the once mud-caked route.Reminders of their travels can be seen along a nearly 2-mile-long (3 kilometers) stretch of coastline near Formby, England. The footprint beds show how, as glaciers melted and sea levels rose after the last ice age ended around 11,700 years ago, humans and animals were forced inland, thus forming a...
