The study of our evolution is very much an open book, which seems to me is having its chapters being written out of order and has no ending. Because we are trying to trace history that there is no history of, it is like we are trying to solve a mystery and the whole world is our crime scene, and oh yeah it's dozens of feet under ground! There seems to be theory after theory and many skeptics, but I believe it to be much simpler than it all seems. The first trace of humanity all comes back to Africa and that is where it all began, as the environment evolved so did we, into different species dependent on natural selection, ultimately ending with us, well for now. If you had what it took you would prevail, if not you died out. Once the woodlands begin to die we traveled to survive. Sure some probably stayed for others emigrated out of Africa to find better food sources. It is true with any animal that you follow the food. The findings at Dmanisi seemed to shake up what we thought was true at one point. Inside of layers of basalt and ash, a team of archaeologists found thousands of stone tools animal fossils and four skulls, two of which were considered "The Old Man and the teenager" (family ties). What was interesting about the findings was, one they seemed to be a hybrid between a Homo habilis and Homo erectus, and two their age! The layers of basalt and ash surrounding the fossils was 1.75 million years old. That's half a million years older than what we previously thought of the homo erectus migration, thus changing our views on the path and timeline of our ancestors. I believe it seemed to be a hybrid because of diversity and evolution. You don't just change overnight so some fossils we will find should seem to be in the "in-between" state of the "species" we have classified. The fossils found at Dmanisi shower a short and
