A new study published in Nature is prompting the rewrite of all biology textbooks relating to the origin and evolution of vertebrates – including the modern human. The study, by Professor Rob Gess from the Albany Museum in Makhanda (Grahamstown) shows that the foundation on which most of the research done on the origin of vertebrates (any animal with a backbone such as goldfish, lizards, crows and people) has been based on incorrect assumptions.
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