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'10,000-Year-Old' Seeds Debunked - Found At Miller Creek, Yukon
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'10,000-Year-Old' Seeds Debunked - Found At Miller Creek, Yukon
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Topic: '10,000-Year-Old' Seeds Debunked - Found At Miller Creek, Yukon (Read 122 times)
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Bianca
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Posts: 41646
Re: '10,000-Year-Old' Seeds Debunked - Found At Miller Creek, Yukon
«
on:
July 13, 2009, 09:23:36 am »
Radiocarbon tests
So Zazula contacted Richard Harington of the Canadian Museum of Nature, one of the authors of the original 1967 Science paper about the seeds.
Harington told Zazula that some of the seeds still existed, though they were coated in paraffin wax to preserve them.
Zazula recruited Fiona Brock, an expert in radiocarbon dating from the University of Oxford, UK and together the researchers found a way to avoid the contamination from the paraffin, and accurately radiocarbon date the seeds for the first time.
The Pleisotocene seeds, it turns out, appear to be from between 1955 and 1957, Zazula's team report in the journal New Phytologist.
The radiocarbon dating did confirm that the lemming skull found alongside the seeds was from the Pleistocene. That validated the original researchers' claim that they had collected Pleistocene samples from deep within the permafrost.
But without their knowledge, the seeds must have fallen into the burrows just years before they were collected. The burrows had likely been exposed by mining activity in the region.
"I was excited that we were able to put a controversy to rest," says Zazula.
"The 'ancient' viable Arctic lupine seed is cited throughout seed germination text books, studies on permafrost and throughout the botanical literature. So, it was nice to be able to conclusively demonstrate the actual age of the seeds."
"The take home message is that any claims for ancient seed viability must be accompanied by rigorous dating methods. If you are going to say something is really old, the research has to effectively demonstrate their age."
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