| molecular analysis of an 11,700-year-old rodent midden from the atacama desert, chile. | dna was extracted from an 11,700-year-old rodent midden from the atacama desert, chile and the chloroplast and animal mitochondrial dna (mtdna) gene sequences were analysed to investigate the floral environment surrounding the midden, and the identity of the midden agent. the plant sequences, together with the macroscopic identifications, suggest the presence of 13 plant families and three orders that no longer exist today at the midden locality, and thus point to a much more diverse and humid c ... | 2002 | 11975707 |