It is not a tree. There are currently four Homo species at the time we started. there are lots of other trial branches. DNA will help sort it out. > > http://blogs.discovermagazine.com/gnxp/2013/01/the-dam-of-ancient-dna-starts-to-break/-One of the bush branches, Red Deer Cave people:-http://discovermagazine.com/2013/jan-feb/51-the-other-humans-who-settled-asia#.UQA-R78pFL8