- 11- The hominin branch of the primate tree includes species that coexisted
- 12- Australopiths were bipedal and had small brains
- 13- Larger brains mark the evolution of
- 14- From origins in Africa, Homo sapiens spread around the world
- 15- Scientific Thinking: New discoveries raise new questions about the history of hominins
- 16- Evolution Connection: Human skin color reflects adaptations to varying amounts of sunlight