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Scientists have long linked the evolution of the human hand—unique for its lengthy opposable thumbs and dexterous fingers—to the rise of stone tools some 2.6 million years ago. These instruments, from primitive chunks of rock used as makeshift hammers to sharp stone flakes created by striking one stone against another and even small handaxes, are typically attributed to Homo habilis, an ancient human species nicknamed “handy man” in honor of its theorized role as the first toolmaker. Early hominins practiced an array of tool-related activities, including hunting, foraging and cooking. But according to a new study from researchers at Chatham...

Ancient human fossils show women much smaller Thu Aug 9, 2007 10:18AM EDT NAIROBI (Reuters) - Homo erectus, long viewed as a crucial evolutionary link between modern humans and their tree-dwelling ancestors, may have been more ape-like than previously thought, scientists unveiling new-found fossils said on Thursday. Revealing an ancient skull and a jawbone from two early branches of the human family tree -- Homo erectus and Homo habilis -- a team of Kenyan scientists said they were surprised to find that early female hominids were much smaller than males. The skull was the first discovery of a female Homo...

A 14,000-year-old thigh bone may upend human history. Unearthed in southwest China, this femur resembles those of an ancient species of humans thought to be long extinct by the Late Pleistocene, scientists say. The scientists compare the leg bone to ancient and modern human femurs in a paper published Thursday in the journal PLOS ONE, arguing that this specimen represents a population of ancient humans that lived surprisingly recently. If they're right, this could dramatically change the way we see human history. Today, our species, Homo sapiens, are the only humans to walk the Earth. But it hasn't always been...

A 14,000-year-old fragment of thigh bone found in a cave in China may represent evidence of the unexpected survival of long-vanished human ancestors. If so, then right into and through the ice age, a creature that was either Homo habilis or Homo erectus survived alongside the Neanderthals, the unknown humans who left behind some DNA in a cave in Siberia, the mysterious so-called hobbit of the island of Flores in Indonesia, and modern Homo sapiens. But by the end of this multicultural ice age 10,000 years ago, only one human species survived. The fossil, a partial femur, had survived unstudied...

After years of studying a mysterious thigh bone from a cave in China, scientists said on Thursday they believe it represents an ancient species of human that persisted much longer than previously thought. The 14,000-year-old bone was uncovered in 1989 in Maludong, known as the Red Deer Cave. The trove of fossils it was initially found with went unstudied until 2012. The partial femur, though relatively young in age, looks like the bones of far older species like Homo habilis and early Homo erectus that lived more than 1.5 million years ago, said the study in PLOS ONE. "Its young...

Oldowan stone-knapping dates back to the Lower Paleolithic period in eastern Africa, and remained largely unchanged for 700,000 years until more sophisticated Acheulean hand-axes and cleavers, which marked the next generation of stone tool technology, came on the scene. It was practiced by some of our earliest ancestors, such as Homo habilis and the even older Australopithecus garhi, who walked on two legs, but whose facial features and brain size were closer to those of apes. In testing five different ways to convey Oldowan stone-knapping skills to more than 180 college students, the researchers found that the demonstration that used...

A "missing link" between humans and their apelike ancestors has been discovered. The new species of hominid, the evolutionary branch of primates that includes humans, is to be revealed when the two-million-year-old skeleton of a child is unveiled this week. Scientists believe the almost-complete fossilised skeleton belonged to a previously-unknown type of early human ancestor that may have been a intermediate stage as ape-men evolved into the first species of advanced humans, Homo habilis.

The new species of hominid, the evolutionary branch of primates that includes humans, is to be revealed when the two-million-year-old skeleton of a child is unveiled this week. Scientists believe the almost-complete fossilised skeleton belonged to a previously-unknown type of early human ancestor that may have been a intermediate stage as ape-men evolved into the first species of advanced humans, Homo habilis. Homo habilis lived 2.0-1.6 million years ago and had a wide distribution in Africa Experts who have seen the skeleton say it shares characteristics with Homo habilis, whose emergence 2.5 million years ago is seen as a key...