Re: Blog: The Scars of Evolution.

Ye Old One wrote:

The Scars of Evolution

http://www.daylightatheism.org/2008/03/the-scars-of-evolution.html

Human beings, like all other species on this planet, have a history.
We came into existence through a process of slow, grinding
trial-and-error, occurring over geological time via the sieve of
differential survival. And like all species, our bodies and our genes
reflect and bear witness to that history. Far from being perfect,
one-time creations, we still bear the scars of the evolutionary
process that made us.

This post will discuss some of the lines of evidence which hint at
humanity's past. I won't repeat that well-known example of an
evolutionary vestige, the human appendix.

Purpose of appendix believed found
http://www.msnbc.msn.com/id/21153898/

• Goosebumps. Fitting neatly together with lanugo is the vestigial
human trait called the pilomotor reflex. When a person is cold or
frightened, tiny muscles at the base of each hair contract, causing
body hair to stand on end. In animals with thicker fur, this is a
useful reflex: erect hairs trap air to create a layer of insulation,
and they also make the animal appear larger and more intimidating. In
humans, however, it is pointless. [...]

Morripilation may well still have an insulating function.
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