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Monday, 6 June 2011

Are Girls Attracted to Smarter Boys: Evolution of Brain by Sexual Selection

Humans have evolved as the most dominant and intelligent species on this planet earth. Once upon a time few million years ago they lived in caves & forests. Gradually they evolved to communicate by verbal tones & gestures. The human population was on the horizon to distinguish themselves from the rest of the species that exists on this planet.
They started living in community, built small huts. They had get together, they sung, they danced and even they played music and now the humans have built the sky scrapers touching the sky, the machines to dig the earth down beyond the sea bed and flying machines to orbit around the earth.
All these fine skills & analytics require advanced brain function of insight & cognition. The brain has evolved drastically from other species. Now the question...why did it evolve so drastically and distinctively.


HANDICAP THEORY
Before I explain why, lets see the physiological aspects of the Brain.
Weight: 1400 G Approx.
Oxygen: 20% utilization
Glucose: 40% utilization
Physiologically brain is a very expensive organ utilizing more glucose and oxygen.
ITS A COSTLY WASTE FOR AN ORGAN TO SURVIVE.

An Example: The peacock's tail. 
The peacock's tail is bright and colorful. The brightest and colorful peacock will be chosen by the peahen for mating (Bright and colorful feathers reflect the good health of the peacock) with an intention to have a healthy progeny.
But the long tail hinders the flight ability of the peacock and more prone to be hunted easily by predators.
 ITS A COSTLY WASTE FOR AN ORGAN TO SURVIVE. 
The bottom line SURVIVAL OF THE SEXIEST IN SEXUAL SELECTION among peacocks.

Evolution of brain is implied as evolution of intelligence. The higher motor functions, thought process, insight, soft skills contribute to be a good musician, a good writer, a scientist, a knowledge worker.
Man developed these qualities basically to interact and to impress his partner during the primitive age by playing music, dancing, verbal conversation ultimately converging to selection of a smart mate for a smarter progeny: 
The bottom line SURVIVAL OF THE SMARTEST IN SEXUAL SELECTION among humans.


So guys get smarter to attract girls.