Koiora | Human Evolution

How did humans change from ape-like ancestors into the smart-phone addicted specimens that we are today? What forces drove our ancestors from the trees and encouraged them to start wandering around on 2 feet? What changes in our skeleton have enabled us to walk around efficiently - and how did bipedalism change the structure of our skull? and why? What has fire got to do with any of this? What else has the use of fire and tools enabled us to do and how has this changed our body structure?

So many questions - if you want the answers, and by answers I mean science's best guesses then lets study human evolution!