Sentences with phrase «early stone tools»

Now that our field school students have gained a good understanding of how early stone tools are made, it is time to find some stone tools in the field!

They argue that it's a «dubious proposition» to put forth fossil bone cutmarks as the primary evidence for early stone tool use.

They «show that early humans (essentially proto - humans) used and made stone tools 3.3 million years ago, which is about 700,000 years earlier than the previously earliest known date for early stone tools,» Erella Hovers, who authored an accompanying «News & Views» article, told Discovery News.

His and others» discoveries of early stone tools in India and Arabia suggest that moderns did expand out of Africa during the early migration windows.

Still, archaeologists suspected that earlier stone tools remained to be discovered, because these examples seemed too advanced to represent humanity's first foray into tool manufacture.

More than half a century later, Premo and colleagues at the University of Tubingen, George Washington University and the Max Planck Institute for Evolutionary Anthropology are asking for better evidence that the technique for making early stone tools was culturally transmitted.

The strength and dexterity needed to use early stone tools shaped our hands into what they are today — judging by the oldest known anatomically modern hand

A young archaeologist re-creates a prehistoric flaked - stone technology in order to understand how our ancestors made and used early stone tools more than two million years ago

There are challenges to finding very early stone tools, he explained, because «they are likely very simple flakes that were originally scattered across the landscape.»

The fossils, found in northern Kenya, bear cut marks from early stone tools and are the oldest evidence of the consumption of aquatic animals by human ancestors, said study researcher Brian Richmond, an anthropologist at George Washington University in Washington, D.C..

Harmand's paper raises questions about who the earliest stone tool makers were — was Kenyanthropus platyops found nearby in the same time range actually the precursor to Homo as its discoverers suggested?

«Nearly everyone that works with the earliest stone tool industries at between 2.3 [million] and 2.5 million years has commented on the surprisingly high level of skill and understanding that we see in these early knappers.

Above this, in sediments 2.5 million years old, are traces of the butchery of large mammals accompanied by some of the earliest stone tools.

Another chapter covers the hunting - versus - scavenging debate, and it is good to see Louis Leakey credited with having already suggested in the 1960s that early stone tools might have been used for scavenging.

Beginning around two million years ago, early stone tool - making humans, known scientifically as Oldowan hominin, started to exhibit a number of physiological and ecological adaptations that required greater daily energy expenditures, including an increase in brain and body size, heavier investment in their offspring and significant home - range expansion.

«The archaeological record of the earliest stone tools does not support a nut - cracking stage in the development of the earliest technology... in most sites the pounding tools used by chimpanzees are very rare.»

Researcher Sonia Harmand holds one of the several stone tools found at the Lomekwi site near Kenya's Lake Turkana; at 3.3 million years old, they are the earliest stone tools ever found.

Key to this is the substantially larger, stronger and more robust thumb displayed by humans with such a thumb allowing humans to forcefully and yet dexterously manipulate objects within the hand, a trait first thought to have evolved alongside the earliest stone tool use between 2.6 — 1.4 million years ago.

This means that our earliest stone tool producing ancestors were likely to have experienced similar recruitment levels, with those individuals displaying a stronger, more robust thumb being more capable stone tool producers and thus having an evolutionary advantage.

Over the last few decades, however, as subsequent discoveries pushed back the date for the earliest stone tools to 2.6 million years ago (Ma) and the earliest fossils attributable to early Homo to only 2.4 - 2.3 Ma, there has been increasing openness to the possibility of tool manufacture before 2.6 Ma and by hominins other than Homo.