A series of tracks created roughly 14,000 years ago has revealed stunning new insight into the ways ancient humans explored dark, potentially treacherous cave systems during the Stone Age. Researchers say at least 180 hand and footprints line the clay-rich floor of Italy’s cave of Bàsura in the famous Toirano caves, indicating ancient humans crawled barelegged through low tunnels as they searched for food and even explored for fun. The group that left behind these tracks thousands of years ago included a total of five individuals, from adults to children as young as 3 years old, who navigated the dark...