Kenyan footprints shed light on prehistoric human cousin Paranthropus

July 28 : Footprints left on a muddy lakeshore in northern Kenya around 1.43 million years ago are providing new insight into the size and behavior of a species in the human evolutionary lineage that was the last of its kind, known for extensive anatomical adaptations for eating tough vegetation.The species, Paranthropus boisei, is known mostly from skull and tooth fossils. Now researchers working along the eastern side of Kenya's Lake Turkana have identified 21 footprints made by eight individuals of this species who appear to have been walking together on a mudflat. They attributed the tracks to this species based on foot shape and gait, and concluded they probably were left by adult males, due to their size.The footprints provide a glimpse into social dynamics in Paranthropus boisei, in