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Homo naledi: New species of ancient human discovered, claim scientists
(Une ancienne espèce présumée du genre humain découverte en Afrique du Sud)

Bones found in South African cave are Homo naledi, a new species of ancient human relative,
say researchers, but some experts are sceptical of find

A huge haul of bones found in a small, dark chamber at the back of a cave in South Africa may be the remnants of a new species of ancient human relative.

Explorers discovered the bones after squeezing through a fissure high in the rear wall
of the Rising Star cave, 50km from Johannesburg, before descending down a long, narrow chute
to the chamber floor 40 metres beneath the surface.

The entrance chute into the Dinaledi chamber is so tight – a mere eight inches wide,
that six lightly built female researchers were brought in to excavate the bones. Footage
from their cameras was beamed along 3.5km of optic cable to a command centre above ground
as they worked inside the cramped enclosure.

The excavators recovered more than 1,500 pieces of bone belonging to at least 15 individuals.
The remains appear to be infants, juveniles and one very old adult. Thousands more pièces
of bone are still in the chamber, smothered in the soft dirt that covers the ground.The leaders of the National Geographic-funded project believe the bones – as yet undated – represent a new species of ancient human relative. They have named the creature Homo naledi, where naledi means “star” in Sesotho, a local South African language. But other experts on human origins say the claim is unjustified, at least on the evidence gathered so far. The bones, they argue, look strikingly similar to those of early Homo erectus, a forerunner of modern humans
who wandered southern Africa 1.5m years ago.

“We’ve found a new species that we are placing in the genus Homo, which is really quite remarkable,” said Lee Berger, a paleoanthropologist who led the work at the University
of Witwatersrand in Johannesburg. He described the slender, small-brained creatures
as “long-legged”, “pinheaded” and “gangly”. The males stood about 5ft, with females a little shorter.

Measurements of the bones show that the creature has a curious blend of ancient ape and modern human-like features. Its brain is tiny, the size of a gorilla’s. Its teeth are small and simple.
The thorax is primitive and ape-like, but its hands more modern, their shape well-suited to making basic tools. The feet and ankles are built for walking upright, but its fingers are curved, a feature seen in apes that spend much of their time in the trees. The findings are reported in two papers published in the online journal eLife.

¤ New species of ancient human discovered, claim scientistq

Bones found in South African cave are Homo naledi, a new species of ancient human relative, say researchers, but some experts are sceptical of find

 A huge haul of bones found in a small, dark chamber at the back of a cave in South Africa may be the remnants of a new species of ancient human relative.

Explorers discovered the bones after squeezing through a fissure high in the rear wall of the Rising Star cave, 50km from Johannesburg, before descending down a long, narrow chute to the chamber floor 40 metres beneath the surface.

The entrance chute into the Dinaledi chamber is so tight – a mere eight inches wide – that six lightly built female researchers were brought in to excavate the bones. Footage from their cameras was beamed along 3.5km of optic cable to a command centre above ground as they worked inside the cramped enclosure.

The excavators recovered more than 1,500 pieces of bone belonging to at least 15 individuals.
The remains appear to be infants, juveniles and one very old adult. Thousands more pieces of bone are still in the chamber, smothered in the soft dirt that covers the ground.

The leaders of the National Geographic-funded project believe the bones – as yet undated – represent a new species of ancient human relative. They have named the creature Homo naledi, where naledi means “star” in Sesotho, a local South African language. But other experts on human origins say the claim is unjustified, at least on the evidence gathered so far. The bones, they argue, look strikingly similar to those of early Homo erectus, a forerunner of modern humans who wandered southern Africa 1.5m years ago.

“We’ve found a new species that we are placing in the genus Homo, which is really quite remarkable,” said Lee Berger, a paleoanthropologist who led the work at the University of Witwatersrand in Johannesburg. He described the slender, small-brained creatures as “long-legged”, “pinheaded” and “gangly”. The males stood about 5ft, with females a little shorter.

Measurements of the bones show that the creature has a curious blend of ancient ape and modern human-like features. Its brain is tiny, the size of a gorilla’s. Its teeth are small and simple.
The thorax is primitive and ape-like, but its hands more modern, their shape well-suited to making basic tools. The feet and ankles are built for walking upright, but its fingers are curved, a feature seen in apes that spend much of their time in the trees. The findings are reported in two papers published in the online journal eLife.

Lee Bergen’s daughter Megan and underground exploration team member Rick Hunter navigate the narrow chutes leading to the Dinaledi chamber.
Lee Bergen’s daughter Megan and underground exploration team member Rick Hunter navigate the narrow chutes leading to the Dinaledi chamber. Photograph: Robert Clark/National Geographic

The Dinaledi chamber has been visited by explorers in the past, and the soft sediments in which the bones were found have been badly disturbed. Because the remains were not encased in rock, Berger’s team has not been able to date them. They could be 3m years old, or far more modern.
No other animals were found in the chamber that might hint at when the human relative got there.

“If this is an ancient species, like a coelacanthe, that has come down through time and is only tens of thousands, or hundreds of thousands of years old, it means that during that time we had a complex species wandering around Africa, perhaps making tools. That would make archaeology very difficult, because we aren’t going to know who made what,” Berger said.

Where the bones were discovered

John Hawks, a researcher on the team, said that despite some of its modern features, Homo naledi probably belonged at the origins of our genus, Homo. “It’s telling us that evolutionary history
was probably different to what we had imagined,” he said. Paul Dirks, another scientist involved,
said that work was ongoing to establish the age of the bones. Some tests, such as carbon dating, will destroy the material, and will only be tried once the bones have been studied more close

Science Weekly New species of human relative discovered

The team lays out fossils of Homo naledi at the University of the Witwatersrand’s Evolutionary Studies Institute.
The team lays out fossils of Homo naledi at the University of the Witwatersrand’s Evolutionary Studies Institute. Photograph: Robert Clark/National Geographic

The conclusion is not widely accepted by others. “Intentional disposal of rotting corpses by fellow pinheads makes a nice headline, but seems like a stretch to me,” said Jungers. Zollikofer agrees. “The ‘new species’ and ‘dump-the-dead’ claims are clearly for the media.
None of them is substantiated by the data presented in the publications,” he said.

Hawks is open to other explanations, but said that disposal made sense. “The evidence really tends to exclude the idea that they entered the chamber one at a time, alive, over some time, because
we have infants, small children, and very old adults who would almost certainly not have managed
to get into this chamber without being deposited there.”

Chris Stringer, head of human origins at the Natural History Museum in London, said that how
the creatures reached their final resting place was a “big puzzle”.

“If we’re talking about intentional disposal, we’re talking about creatures with a brain the size
of a gorilla’s going deep into a cave, into the dark, and posting bodies through a small fissure
into this cave chamber. It’s remarkably complex behaviour for what we’d think of as a very primitive human-like species. Whether there are other explanations remains to be seen, but it’s one
of the plausible explanations,” he said.

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