The footprints were left in the mud by two different species “within a matter of hours, or at most days,” a co-author of the ...
More than 1.5 million years ago, two different species of ancient human crossed paths on a lakeshore, perhaps locking eyes ...
Fossilised footprints discovered in northern Kenya reveal that about 1.5 million years ago, two human evolutionary species, ...
Study provides first evidence of different bipedalism styles on same footprint surface, attributed to both species.