A very recent speciation time of human-chimp
Hobolth A, Christensen OF, Mailund T, Schierup MH (2007) Genomic Relationships and Speciation Times of Human, Chimpanzee, and Gorilla Inferred from a Coalescent Hidden Markov Model. PLoS Genet 3(2): e7
They estimate 4.1 million years ago. It’s open access so no excerpts needed.





hawks will have something to say i wager….
a 1,000-fold increase in data soon to arrive…I bet 4.1 million years is the upper limit, they could not get themselves challenge orthodoxy in a grosser manner. Data is on its way, so further speculation is moot.