Bipedalism is a demanding and risky strategy. It means refashioning the pelvis into a full load-bearing instrument. To preserve the required strength, the birth canal in the female must be comparatively narrow. This has two very significant immediate consequences and one longer-term one. First, it means a lot of pain for any birthing mother and greatly increased danger of fatality to mother and baby both. Moreover, to get the baby's head through such a tight space it must be born while it's brain is still small - and while the baby, therefore, is still helpless. This means long-term infant care, which in turn implies solid male-female bonding.
Bill BrysonAbout author
- Author's profession: Writer
- Nationality: american
- Born: December 8, 1951
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Variety is very, very good. Going from medium to medium, if you get the chance to do it, from theater to television to film, which are all distinctly different, keeps me sharp. What works in one doesn't work in the other, and you have to be looking for the truth of the performance, whatever way that medium might demand.
Kenneth Branagh