Birth of Humanity Discussion

Sometimes the names of the fossils are debated. Homo rudolfenesis and Homo habilis are often considered the same species. Also, Homo ergaster and Homo erectus are usually lumped together. There is often confusion about this since your book considers Turkana boy to be Homo ergaster and the film calls him Homo erectus.
What are the new human characteristics that develop with Homo erectus? Why did our brains start to grow? Why did Homo erectus leave Africa and what difficulties do you think they encountered? How do you think life was different outside of Africa?

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