Dating and melting
The weapons, which include a 2,400-year-old spear throwing tools, a 1,000-year-old ground squirrel snare, and bows and arrows dating back 850 years, have been found high in the remote Mackenzie Mountains, a region where Mountain Boreal caribou abound in the summer months.
"We are talking of complete examples of ancient technology, including arrows with wooden shafts, feathers and sinew hafting.
Here we present an alternative explanation and a novel glacier foreland food web by showing that pioneer predators eat locally produced midges containing 21,000 years old ancient carbon released by the melting glacier.
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"Following that discovery, we recovered more than 200 ancient hunting artifacts, with the oldest dating back more than 9,000 years," Greg Hare, the Yukon archaeologist who analyzed the original discovery, told Discovery News.Glaciers are retreating and predatory invertebrates rapidly colonize deglaciated, barren ground.
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