'1.5-million-year-old mystery': Footprints reveal our ancestors shared space with another species. Who were they?

Produced by: Mohsin Shaikh

Ancient Footprints

In a stunning revelation, 1.5-million-year-old hominin footprints reveal two species traversing Lake Turkana’s ancient shores, offering a vivid glimpse into a shared past of survival and competition.

Credit: Kevin Hatala/Chatham University

Parallel Paths

Homo erectus and Paranthropus boisei, two contemporaneous hominins, walked the same terrain, suggesting overlapping lifestyles and possible interactions as they evaded predators and sought food.

Credit: Louise N. Leakey, Turkana Basin Institute and Stony Brook University

Evolving Rivalries

The discovery, published in Science, showcases a dynamic where cooperation and competition shaped the evolutionary paths of these two species living side by side.

Credit: Neil T. Roach/Harvard University

Sediment Secrets

Rutgers Professor Craig Feibel’s expertise in stratigraphy narrowed the tracks’ creation to mere hours apart, uncovering a moment frozen in soft sediment.

Credit: Craig Feibel/Rutgers University

Behavioral Clues

Lead author Kevin Hatala explains how fossil footprints unlock behavioral insights unattainable from bones, capturing ancient locomotion and interactions.

Technological Breakthrough

Cutting-edge 3D imaging by Hatala and his team distinguished the anatomical traits of the two species, pushing the boundaries of biological anthropology.

Credit: Kevin Hatala/Chatham University

Local Discoveries

A Kenyan excavation team, led by Cyprian Nyete, stumbled upon the prints in 2021, uncovering them beneath layers of sediment after spotting fossils exposed by heavy rains.

Serendipitous Find

Louise Leakey's coordinated effort following the unexpected discovery of giant bird tracks revealed hominin footprints, a testament to the role of chance in groundbreaking science.

Credit: Louise N. Leakey, Turkana Basin Institute and Stony Brook University

Unanswered Questions

Though Homo erectus thrived for a million years more, Paranthropus boisei vanished shortly after. The reason for their differing fates remains a haunting mystery.