Giant 10ft-tall Mongolian camels were killed and eaten by archaic humans before going extinct 27,000 years ago, a study shows. Scientists have studied fossils of the extinct species (Camelus knoblochi) from Tsagaan Agui Cave in the Gobi Altai Mountains of southwestern Mongolia. One of the bones shows signs of both butchery by humans, likely to extract protein-rich marrow, and 'hyenas gnawing on it'. Humans coexisted briefly with the last of ...