Found at Koobi Fora near Lake Turkana, the footprints show that *Paranthropus boisei* and *Homo erectus* shared the same ...
Scientists examined 1.5-million-year-old fossils they unearthed, concluding they represent the first example of two sets of ...
Researchers say the footprints were left in the mud by two different species, perhaps within a matter of hours or days.
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