Mysterious species buried their dead and carved symbols 100,000 years before humans

CNN - Researchers have uncovered evidence that members of a mysterious archaic human species buried their dead and carved symbols on cave walls long before the earliest evidence of burials by modern humans.The brains belonging to the extinct species, known as Homo naledi, were around one-third the size of a modern human brain. The revelations could change the understanding of human evolution, because until now such behaviors only have been associated with larger-brained Homo sapiens and Neanderthals.