Anthropologists have unearthed the remains of an apparent Neanderthal cave sleeping chamber, complete with a hearth and nearby grass beds that might have once been covered with animal fur.
Neanderthals inhabited the cozy Late Pleistocene room, located within Esquilleu Cave in Cantabria, Spain, anywhere between 53,000 to 39,000 years ago, according to a Journal of Archaeological Science paper concerning the discovery.
Living the ultimate clean and literally green lifestyle, the Neanderthals appear to have constructed new beds out of grass every so often, using the old bedding material to help fuel the hearth.