Why Amy Doesn't Tip Over

Hmm, I was thinking it was because she can still outrun Gus. Apparently there is a more complicated, scientific answer. Whatever the reason, my hat is off to the child bearers.

Cheers!

"Why Pregnant Women Don't Tip Over"
http://www.nytimes.com/2007/12/12/science/12cnd-pregnant.html?em&ex=1197781200&en=9ee163509360e953&ei=5087%0A

What they found, said Katherine K. Whitcome, a post-doctoral fellow at Harvard and the lead author of the paper, was evidence that evolution had produced a stronger and more flexible lower spine for women. After studying 19 pregnant subjects, Ms. Whitcome found that the lumbar, or lower back, curve in women extends across three vertebrae, as opposed to just two in men. And the connecting points between vertebrae are relatively larger in women, and shaped differently in ways that make the stack more stable and less prone to the bones shifting out of alignment or breaking.