| the biogeochemistry of selenium in sunan grassland, gansu, northwest china, casts doubt on the belief that marco polo reported selenosis for the first time in history. | in order to clarify the historic academic problem of whether or not livestock poisoning in ancient suzhou of northwest china, recorded by marco polo in 1295, was selenosis, this study deals with the biogeochemistry of selenium in sunan county in the hexi corridor, which is part of ancient suzhou in china. it was found that quite a number of farm animals had suffered from intoxication and died as a result of grazing poisonous grasses, mostly oxytropis dc, stellera chamaejasme, and achnatheru ineb ... | 2008 | 18351293 |