Need done by 5pm July 7

This week I'd like you to first review your knowledge of hominin fossils by taking the online mystery skull challenge at http://humanorigins.si.edu/evidence/human-fossils/mystery-skull-interactive.

Write 200 words all together on "When did we become human?" Since we have gone over all of our hominin ancestors - that we know of - I'd like you to refer to these two resources, http://humanorigins.si.edu/evidence/human-family-tree, http://humanorigins.si.edu/evidence/human-fossils/species, and consider:

(1) At what point in our evolution did we become human and why? Was it with the first bipeds? With the first stone tools? With a human-like growth and developmental process? With art, language, and burials? etc.... and

(2) In which hominin did this occur?