humans and primates?

Question

what are the major physical features, such as the adaptation to tree life, that define humans as primates?

Answer 1

Here is an article called "The unique characteristics of primates." Because this article lists the characteristics that makes a primate, then those traits that match humans are traits that makes us primates. Interesting topic.

http://nationalzoo.si.edu/Animals/Primates/Facts/Primateness/default.cfm

Answer 2

Humans live in trees? We had to adapt to this?

Answer 3

Forward facing eyes to give stereoscopic vision, opposable thumb, nails instead of claws.