Study provides first evidence of different bipedalism styles on same footprint surface, attributed to both species.

The researchers believe the footprints were made within hours of each other on the shores of an ancient lake in present-day Kenya.

About 1.5 million years ago, two different species of early man likely came within hours of passing each other on the shores of what is now known as Lake Turkana in Kenya. Two sets of footprints tracing each hominin's path represent the first geological record of such an example,

A 1.5-million-year-old lakebed from Kenya shows two ancient human relatives cohabitating an environment, shaking up our ancestors' story.

An international team of researchers said Thursday that they had found two sets of hominin footprints that were made about the same time on an ancient lake’s shore in present-day Kenya. It is, they said, a “fossil first” that offers proof different hominin species lived at the same time and space.

Two species of ancient humans walked beside each other 1.5 million years ago, fossil footprints have revealed.

The research included professors Kevin Hatala from Chatham U. in Pittsburgh and Craig Feibel of Rutgers and showed two human species might have competed or cooperated.

Footprints preserved on the shore of Lake Turkana in Kenya seem to be from two ancient human species, showing they lived there at the same time about 1.5 million years ago

Muddy footprints left on a Kenyan lakeside suggest two of our early human ancestors were neighbors some 1.5 million years ago.

About 1.5 million years ago, individuals of two different species in the human evolutionary lineage trudged on a muddy lakeshore in northern Kenya, leaving behind intersecting trackways alongside the footprints of antelopes,

Ancient footprints discovered in Kenya belong to two different species of human relatives who walked on the same ground at the same time 1.5 million years ago, a study found.