Walking on all fours

Hello

Did anyone one else see the Nova special about the family that walks on all fours limbs.

http://www.pbs.org/wgbh/nova/allfours/

Interesting in that at first scientist were looking for genes that might be throwbacks to ancient ancestors. Only to discover genes that maybe part of the mechanics for humans to walk upright were found in some non-bipedal animals.

And towards the end they were considering that certain ancestor/evolutionary genes may still exist in our genetic code. But there was still an enviormental componant to gene activation, how the children were raised did not at the time needed provide the stimulation for continued bipedal developement.

Can not explain it properly, but what do you think about humans still need to progress in stages, particularly during infancy, though more primative forms of evolutionary developement. And that unless the stimulation, or need for more advanced human traits is not met it leads to a halting in developement of such traits?

Mr D

Watch it if you can, for not only is it interesting on subject matter of the people involved. But also how the scientific community thinks and acts in studying the behavior, and the conclusion it draws at various stages of its own investigation.