edd8620a_ry___Did_man_evolve_from_apes___Apes
[0] 3 [Man] S-shaped spine for upright stance and walking, sacrum broad, curved and tilted; typically five lumbar vertebrae, larger than in apes [Apes] 
C-shaped spine for walking on all fours, sacrum narrow, straight and parallel to spine; typically four lumbar vertebrae
A New Approach to Earth History | Did man evolve from apes?
Apes