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News: Were seafarers living here 16,000 years ago?
http://www.canada.com/victoriatimescolonist/news/story.html?id=34805893-6a53-46f5-a864-a96d53991051&k=39922
 
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Were Eastern Canary Islands Wetter 50,000 Years Ago?

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Author Topic: Were Eastern Canary Islands Wetter 50,000 Years Ago?  (Read 99 times)
Starlena
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« on: October 29, 2009, 02:47:46 am »

Consequently the eastern Canary Islands experienced an overall increase in dryness during the last 50,000 years, eventually yielding the current semiarid conditions. Today the low-altitude eastern islands are characterized by low annual rainfall and a landscape of short grasses and shrubs, Yanes says.

The research advances understanding of the global paleoclimate during an important time in human evolution, when the transition from gathering and hunting to agriculture first occurred in the fertile Middle East and subsequently spread to Asia, North Africa and Europe.

"In the Canary Archipelago, land snails are one of the rare 'continuous' records of paleoclimatic conditions over the last 50,000 years," Yanes says. "The results of this study are of great relevance to biologists and paleontologists investigating the evolution of plants and animals linked to climatic fluctuation in the islands."

The researchers' isotopic evidence reflects changing atmospheric and oceanic circulation associated with the waxing, waning and subsequent disappearance over the past 50,000 years of vast ice sheets at mid- to high latitudes on the continents of the Northern Hemisphere.
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