That is a very uncertain flow chart, with a composite skull on the top that has been built up of what looks like 200 parts that were scraped up off an African plain, and is dated to 1.7 mya give or take several thousand years for each fragment.
What I want to know is, how has 'science' become so audacious as to assert that these composite skulls are anything other than manifestation of their imaginations??
Wolf