Mais uma teoria sobre o bipedalismo vai para a lata do lixo da
História da Ciência  segunda-feira, fevereiro 25, 2013  Grassed
up   Feb 16th 2013 |From the print edition  AFRICA’S great
grasslands are one of that continent’s most famous features.
They are also reckoned by many to have been crucial to human
evolution. This school of thought holds that people walk upright
because their ancestors could thus see farther on an open plain.
Forest primates do not need to be bipedal, the argument
continues, because the trees limit their vision anyway.  As
“Just So” stories go, it is perfectly plausible. But some go
further and argue that the transition took place when the
savannahs themselves came into existence, replacing the pre-
existing forest and forcing human ancestors to adapt or die out.
Fossil evidence suggests humanity’s upright stance began to
evolve between 6m and 4m years ago. So the question is, did that
coincide with the formation of the savannah? A paper in Geology,
by Sarah Feakins, of the University