>We still carry our pre-human heritage around with us in our heads>

Phylogeny recaptitulates ontology?

That's a phrase (or something like it) that was supposed to illustrate how humans display the history of evolution during gestation.

Apparently it has been discredited due to Victorians drawing stuff they way they wanted it rather than the way it actually is.

Yet people still talk about Mammalian brain and lizard brain. There is allocortex (evolutionarily older)and neocortex (evolutionarily younger).