Sentences with phrase «sharp stones»

To start, the trio butchered a sheep carcass with sharp stone flakes and found that the cutmarks indeed resembled those found on two different Australopithecine fossil arm bones — one dating to 4.2 million years ago and the other to 3.4 million years ago — as well as 2.5 - million - year - old animal bones discovered near the known stone tools in the Olduvai Gorge.

A flint - knapper makes sharp stone flakes by striking a flint «core» with a hammerstone.

The idea comes from Kyle Brown, an experimental archaeologist at the University of Cape Town, South Africa, whose team found sharp stone blades dating from 47,000 to 164,000 years ago around Still Bay, east of Cape Town.

It all began hundreds of thousands of years ago when a distant ancestor began using sharp stone flakes to scrape meat off skin and bones.

Animal bites leave U-shaped furrows, the researchers argued, whereas sharp stone tools leave characteristic V - shaped cuts with striations — linear marks — along the insides of the grooves.

Capuchin monkeys in Brazil produce sharp stone flakes, a behavior believed to be unique to humans and their ancestors.

We land in a stark, narrow offshoot of Cuchillo Creek, where the dried - up bed is a craggy mess of sharp stones and bulging landmasses laced in loose gravel.

A shadow suddenly reared up in the gloom and she stumbled in fear, falling hard in a bloddy scrape of skin on sharp stone.

Somewhat away from other activities was an area scattered with sharp stone chips; for people like Jondalar, she thought, flintknappers who made tools, knives, and spear points.

If you are building a garden pond, use old carpet to line it before you put the pond liner in - it protects the liner from sharp stones

PREHISTORIC humans may have harnessed fire to make hard, sharp stone blades soon after Homo sapiens emerged in eastern Africa 200,000 years ago.

(A couple of vehicles in our test group suffered sidewall punctures - tough to do, we reckoned, as there's not much sidewall to mess with - but this happened not on the rocks but in a rainy sluice littered with sharp stones and tree branches.

The cut marks had clearly been made using a sharp stone, and they were at a site that was used by Lucy's species, Australopithecus afarensis.

Thanks to the greater sidewall height that exceeds the one typical of the 21 - inchers selected by other brands, sharp stones and tall curbs are also less of a threat.

The rubber sole offers protection from broken glass, sharp stones, and nails, so walking in urban areas doesn't need to cause stress.

They act to keep your dog's paws clean, comfortable, and protected from sharp debris such as glass or sharp stones.

Starting back in the stone ages, when a person created their resume (typed, written by hand, chiseled with a sharp stone and slate, etc.) they would typically start the resume with an objective statement like this: