Muddy footprints left on a Kenyan lakeside suggest two of our early human ancestors were nearby neighbors some 1.5 million years ago. The footprints were left in the mud by two different species “within a matter of hours,

Scientists discovered fossilized footprints along Lake Turkana, Kenya, revealing that early human ancestors Homo erectus and Paranthropus boisei coexisted around 1.5 million years ago. The distinct footprints show different walking styles,

As Homo erectus and Paranthropus boisei – a direct ancestor and an ancestral relative of modern humans, respectively – lived their lives in the Turkana Basin, they left their footprints, impressed deep in the mud around the lake, probably with barely a thought.