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It will go down as one of the most amazing archeological discoveries in history. Homo naledi - a new species of human-like fossils found in South Africa - is already rewriting the story of human evolution. These 15 skeletons are the largest cache of pre-human bones ever found, but so far, scientists don't know how old they are, or why they were placed in this burial site. Crawling Toward History; Homo Naledi: Our Newest Oldest Relative?; Werner Herzog on the Deep History of Chauvet Cave; Ancient Shamans and Roving Neandertals; Michelle Paver on Stone Age Novels; Remembering 9/11 Through The Lens Of A Photojournalist.