Bone Sizes Trace the Decline Of Man (and Woman)

摘要

When paleontologist Stephen J. Gculd teaches his history of life course to Harvard undergraduates, he flashes slides from popular media that depict human ancestors marching through time. The earliest members of our genus, Homo, appear short and stooped, but as time passes, our forebears gradually grow taller and bigger brained. The march of progress culminates in the implicit masterpiece of evolution—big-brained, upright, modem humans.