Two paleontologists, Dr  Tyson and Dr  Rees, disagree over the interpretation of certain footprints that were left among other footprints in hardened volcanic ash at site G  Dr  Tyson claims they are clearly early hominid footprints since they show human characteristics: a squarish heel and a big toe immediately adjacent to the next toe  However, since the footprints indicate that if hominids made those prints they would have had to walk in an unexpected cross-stepping manner, by placing the left foot to the right of the right foot, Dr  Rees rejects Dr
Tyson' s conclusion
The footprints showing human characteristics were clearly those of at least two distinct individuals.