Showing posts with label Charles Darwin. Show all posts
Showing posts with label Charles Darwin. Show all posts

Friday, February 24, 2012

(2) The value of pubic hair to human survial


Jack Dikian
February 2012

In the series looking at the New Scientist eccentricities of humans and what impact these have in overall survival value and evolutionary rationale. Here is another – Pubic hair.

While primates have finer hair around their genitals than on the rest of their body, adult humans sport an impressively thick bush of pubic hair.

Robin Weiss, Professor of Viral Oncology at University College London, in Journal of Biology, Vol 8 observes that pubic hair became thicker than that on the rest of our bodies at some point in our evolution and this must have happened for a reason. There is really no accepted explanation, however some advantages.…


Why would we evolve a response that lets others know that we are embarrassed or stressed


Jack Dikian
February 2012

For the next 10 days I thought I’d share what New Scientist published back in 2009 examining the eccentricities of humans, what impact these have in overall survival value and evolutionary rationale.

Blushing is the involuntary reddening of people’s face and neck due to embarrassment or emotional stress. It is thought that blushing is the result of an overactive sympathetic nervous system. Why would we evolve a response that lets others know that we are embarrassed or stressed.



Saturday, February 18, 2012

Hat Size and Intelligence...


Jack Dikian
February 2012

These days we use statistically reliable and well-known cognitive assessments such as Wechsler Adult Intelligence Scale to help determine cognitive function (let’s say intelligence for the sake of this blurb). These assessments generally measure a person's performance on several markers relative to that of his or her peers and include a series of analytical, mathematical, and spatial activities.

Let’s now rewind time back to 1870’s when Charles Darwin’s cousin, a scientist called Francis Galton got a brilliant idea or two. The good cousin becomes fascinated by animal breeders bringing about new advances in the varieties of dogs, sheep and cattle. His big idea was to use Darwin’s selection for a practical and political purpose - breading better humans.

He writes, “if only one 20th of the cost and pains spent on the measures of the human race then is spent on the improvement of breads of horses and cattle, what a galaxy of genius might we not create.” The term eugenics was coned - the application of animal breading concepts to humans.

His idea was underpinned by the belief that traits such as intelligence, genius, and memory were inherited in just the same way as the physical traits of cattle and sheep.

Interesting in one survey he distributed to 330 eminent men, as well as a question about “energy of mind”, he seeked to learn the hat size of the group - believing of course smart people must have bigger heads. Darwin’s hat size was considered a respectful 22 inches and a quarter.



Friday, February 17, 2012

Science inflicting wounds on humanities’ pride


Jack Dikian
February 2012

Our fragile pride

Sigmund Freud said that science inflicted three wounds on humanities’ pride. The first when Copernicus showed that Earth wasn’t the centre of the Solar system, then Charles Darwin showing that man evolved from other animals and then Freud himself that mankind is not [always] in control of their own behaviour and emotions. That is, human nature began with animal nature - and so Darwin’s dangerous idea is alive and almost visible inside all of us.