title: DNA clock proves tough to set.
authors.forename: Ewen
authors.initials: E
authors.lastname: Callaway
mesh_terms: D000328:Adult; D000818:Animals; D002648:Child; D003226:Congresses as Topic; D004247:DNA / Q000235:genetics*; D005580:Fossils; D016678:Genome / Q000235:genetics*; D006801:Humans; D016296:Mutagenesis / Q000235:genetics*; D059645:Mutation Rate; D011323:Primates / Q000235:genetics; D013997:Time Factors; D035501:Uncertainty
chemical_list: D004247:DNA