Laetoli, an archaeological site in Tanzania, contains (among other things) a number of hominid footprints, dated in the order of 3.5 to 3.7 million years old. There is a degree on controversy over what made the tracks. Some sources would have you believe that the hominid that made the tracks would have to have been quite “modern” in the way that they walked. Others would disagree.
In late July a paper came out that more-or-less seems to confirm that the tracks are indeed by animals with a more modern gait, but cannot answer the question of what species made it. Continue reading