A Menagerie of 13,000-Year-Old Life

In the low oxygen waters of a deep pit inside a cave known as Hoyo Negro (“Black Hole”), scientists have not only found the 13,000-year-old remains of a female body but also the skeletons of saber-toothed cats, elephant-like animals called gomphotheres, giant sloths, and other wild creatures. The human, referred to as Naia, “is the oldest, most complete human skeleton yet discovered in the Americas,” …