(Archaeopteryx
Lithographica) Transitional fossil between reptiles and birds.

 

Diagram of lateral
protohuman skulls in a transitional progression

Comparison of skulls of
Modern Chimp, Afarensis (Lucy’s family), Homo Erectus and modern man.

Reconstruction of Lucy’s
skeleton in dental plaster to show how she stood upright.

Comparison of the pelvis
bones of Lucy, modern human, and a chimpanzee.