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Re: Brain size does not = intelligence in humans?
When mutated, these genes result in an abnormally small brain, a
condition known as congenital microcephaly.
Researchers had expected that people with evolved versions of the gene
would be smarter and have bigger heads, but were surprised to find this
wasn't the case, Luciano says.
Why would anyone expect that? Why shouldn't the mutated allele be simply
neutral -- or perhaps have a slight detrimental effect (_assuming_ here that
it's similar to the mutation that causes microcephaly)?
"We would predict that if you've got the more recent version you should
have a higher IQ," she says.
I don't see why.
Professor Colin Groves, an expert in human evolution from the Australian
National University, says human brains began getting bigger after our
earliest ancestors like Homo habilis appeared.
Together with body size, right?
But our brains have stopped growing and have actually started getting
smaller, or at least more 'compact'.
"[Our brains] have got bigger but they're not getting bigger," he says.
"In fact since the late Pleistocene in general they've got smaller."
I think this is taking the Neandertalers into account, which had -- on
average -- bigger brains, both in absolute and relative measures, than us.
While brain size appears to be related to intelligence between species,
News to me...