Karl Von Linne (or Linnaeus, as he is widely known) was a Swedish biologist who devised the system of Latinised scientific names for living things that biologists use to this day. When he came to (1) people into his system, he put them into a group called Ho mo--and Linne’ s hairless fellow humans are still known biologically as Homo sapiens. (2) the group originally had a second member, Homo troglodytes. It lived in Africa, and the pictures show it to be covered (3) hair.
Modern (4) are not as generous as Linne in welcoming other species into Man’ s lofty (5) , and the chimpanzee is now referred to (6) Pan troglodytes. But Pan or Homo, there is no (7) that chimps are humans’ nearest living relatives, and that if the secrets of what makes humanity special are ever to be (8) , understanding why chimps are not people, nor people chimps, is a crucial part of the process. That, in turn, means looking at the DNA of the two species, (9) it is here that the (10) must originate.
One half of the puzzle has been (11) for several years: the human genome was published in 2001. The second has now been added, with the announcement in this week’s Nature (12) the chimpanzee genome has been sequenced as well. For those expecting (13) answers to age-old questions (14) , the publication of the chimp genome may be something of an (15) There are no immediately obvious genes--present in one, but not the other--that account for such characteristic human (16) as intelligence or even hairlessness. And (17) there is a gene connected with language, known as FOXP2, it had already been discovered. But although the preliminary comparison of the two genomes (18) by the members of the Chimpanzee Sequencing and Analysis Consortium, the multinational team that generated the sequence, did not (19) any obvious nuggets of genetic gold, it does at least show where to look for (20) .

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