The origin of all of our species lied somewhere in Africa: It's where we first evolved and where we've spent the majority of our time on Earth. We have since migrated to every corner of the globe, a journey that is documented in all of our DNA. A comprehensive analysis was run, to identify the thousands of genetic markers, or the "breadcrumbs" in all DNA, which is passed down from generation to generation. By looking at the order, in which those markers occurred over time, we can trace the journey of our ancestors out of Africa. Furthermore, with those markers came the creation of a human family tree. Everyone alive today, falls on a particular branch of that family tree.