Muddy Footprints Suggest 2 Species of Early Humans Were Neighbors in Kenya 1.5 Million Years Ago

An aerial view shows a research team standing alongside the fossil footprint trackway at the excavation site on the eastern side of Lake Turkana in northern Kenya in 2022. AP
An aerial view shows a research team standing alongside the fossil footprint trackway at the excavation site on the eastern side of Lake Turkana in northern Kenya in 2022. AP
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Muddy Footprints Suggest 2 Species of Early Humans Were Neighbors in Kenya 1.5 Million Years Ago

An aerial view shows a research team standing alongside the fossil footprint trackway at the excavation site on the eastern side of Lake Turkana in northern Kenya in 2022. AP
An aerial view shows a research team standing alongside the fossil footprint trackway at the excavation site on the eastern side of Lake Turkana in northern Kenya in 2022. AP

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, or at most days,” said paleontologist Louise Leakey, co-author of the research published Thursday in the journal Science.
Scientists previously knew from fossil remains that these two extinct branches of the human evolutionary tree – called Homo erectus and Paranthropus boisei – lived about the same time in the Turkana Basin.
But dating fossils is not exact. “It’s plus or minus a few thousand years,” said paleontologist William Harcourt-Smith of Lehman College and the American Museum of Natural History in New York, who was not involved in the study.
Yet with fossil footprints, “there’s an actual moment in time preserved,” he said. “It’s an amazing discovery.”
The tracks of fossil footprints were uncovered in 2021 in what is today Koobi Fora, Kenya, said Leaky, who is based at New York's Stony Brook University.
Whether the two individuals passed by the eastern side of Lake Turkana at the same time – or a day or two apart – they likely knew of each other’s existence, said study co-author Kevin Hatala, a paleoanthropologist at Chatham University in Pittsburgh.
“They probably saw each other, probably knew each other was there and probably influenced each other in some way,” The Associated Press quoted him as saying.
Scientists were able to distinguish between the two species because of the shape of the footprints, which holds clues to the anatomy of the foot and how it’s being used.
H. erectus appeared to be walking similar to how modern humans walk – striking the ground heel first, then rolling weight over the ball of the foot and toes and pushing off again.
The other species, which was also walking upright, was moving “in a different way from anything else we’ve seen before, anywhere else,” said co-author Erin Marie Williams-Hatala, a human evolutionary anatomist at Chatham.
Among other details, the footprints suggest more mobility in their big toe, compared to H. erectus or modern humans, said Hatala.
Our common primate ancestors probably had hands and feet adapted for grasping branches, but over time the feet of human ancestors evolved to enable walking upright, researchers say.
The new study adds to a growing body of research that implies this transformation to bipedalism – walking on two feet — didn’t happen at a single moment, in a single way.
Rather, there may have been a variety of ways that early humans learned to walk, run, stumble and slide on prehistoric muddy slopes.
“It turns out, there are different gait mechanics – different ways of being bipedal,” said Harcourt-Smith.



10 Endangered Black Rhinos Sent from S.Africa to Mozambique

Kenya Wildlife Services veterinarians and rangers rush to aid a sedated female black Rhinoceros that has been selected for translocation to the Segera Rhino Sanctuary from the Lake Nakuru National Park on June 07, 2025. (Photo by Tony KARUMBA / AFP)
Kenya Wildlife Services veterinarians and rangers rush to aid a sedated female black Rhinoceros that has been selected for translocation to the Segera Rhino Sanctuary from the Lake Nakuru National Park on June 07, 2025. (Photo by Tony KARUMBA / AFP)
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10 Endangered Black Rhinos Sent from S.Africa to Mozambique

Kenya Wildlife Services veterinarians and rangers rush to aid a sedated female black Rhinoceros that has been selected for translocation to the Segera Rhino Sanctuary from the Lake Nakuru National Park on June 07, 2025. (Photo by Tony KARUMBA / AFP)
Kenya Wildlife Services veterinarians and rangers rush to aid a sedated female black Rhinoceros that has been selected for translocation to the Segera Rhino Sanctuary from the Lake Nakuru National Park on June 07, 2025. (Photo by Tony KARUMBA / AFP)

Ten black rhinos have been moved from South Africa to Mozambique to secure breeding of the critically endangered animals that became locally extinct 50 years ago, conservationists said Thursday.

The five male and five female rhinos were transferred to Mozambique's Zinave National Park in a 48-hour road trip last week, said the Peace Parks Foundation, which took part in the translocation.

"It was necessary to introduce these 10 to make the population viable," communication coordinator Lesa van Rooyen told AFP.

The new arrivals will "secure the first founder population of black rhinos since becoming locally extinct five decades ago,” South Africa's environment ministry, which was also involved, said in a statement.

Twelve black rhinos had previously been sent from South Africa to Zinave in central Mozambique but the population was still not viable for breeding, Van Rooyen said.

Twenty-five white rhinos, which are classified as less threatened, were also translocated in various operations.

The global black rhino population dropped by 96 percent between 1970 and 1993, reaching a low of only 2,300 surviving in the wild, according to the International Rhino Foundation.

Decades of conservation efforts allowed the species to slowly recover and the population is estimated at 6,421 today.

Once abundant across sub-Saharan Africa, rhino numbers fell dramatically due to hunting by European colonizers and large-scale poaching, with their horns highly sought after on black markets particularly in Asia.

Mozambique's population of the large animals was depleted during the 15-year civil war, which ended in 1992 and pushed many people to desperate measures to "survive in very difficult circumstances", van Rooyen said.

Years of rewilding efforts have established Zinave as Mozambique’s only national park home to the "Big Five" game animals -- elephant, rhino, lion, leopard and buffalo.