A) Taxonomist Linneaus recorded about 4,200 species. B) Ecologist Robert May suggested that we know more about the Milky Way than we do about the individual species found on this planet. C) It is agreed upon that 85 to 95% of some groups, like bacteria and insects, have yet to be discovered. D) Biogeographers recognize 18 "hot spots" for biodiversity. E) The greatest diversity of species when compared to other areas is in the deserts of Africa.