BTW, I commented earlier that once you leave out the Shipton track, most of the other tracks look like variations on the Orang Pendek track. This shows the reason why: it is an older, conservative-ape type of track derived from the Miocene apes. The ancestors of the orangutans had this type of foot and footprint, and so did Ardipithecus, likely immediate ancestor to Australopithecus.
BTW, I commented earlier that once you leave out the Shipton track, most of the other tracks look like variations on the Orang Pendek track. This shows the reason why: it is an older, conservative-ape type of track derived from the Miocene apes. The ancestors of the orangutans had this type of foot and footprint, and so did Ardipithecus, likely immediate ancestor to Australopithecus.
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