Women's Spinal Evolution
Researchers find that women's spines are evolved to curve at the lower vertabrae to reduce back pressure during pregnancy. Women actually lean back as a result of the curvature.
The interesting news is that this makes them less likely to tip over! And we all know - Women wobble but they don't fall down!
Read the Full New York Times article by going to: http://www.nytimes.com/2007/12/13/science/13pregnant.html?_r=1&oref=slogin