Wednesday 8 February 2012

From the sublime to the ridiculous

Great science story in the Telegraph today: a 'new' oldest group of organisms on earth has been found: they're somewhere between 12,000 and 200,000 years old (most likely around 100,000 years). Each spans 10 miles and weigh more than 6,000 tons! They're sea grasses in the Mediterranean, as here:

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Great work by Professor Carlos Duarte of the University of Western Australia. Then he goes and spoils it all by claiming "If climate change continues, the outlook for this species is very bad". What? At 200,000 years, the things have lived through the better part of two full-blown ice ages! If they're over about 130,000 years old, they lived through the last interglacial, which was nearly 3ºC or about 5ºF warmer than today. See this temperature reconstruction from the Vostok (Antarctica) ice core:

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Even at 12,000 years old, they'd have seen some of the last full-blown ice age. And they'd have lived through the Holocene climate optimum (around 8,000 and 7,000 years before the present) and the Minoan, Roman and Medieval warm periods: all warmer than at present, as shown by this Greenland ice core:

 

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You don't get beyond your 12,000th (or 100,000th or 200,000th) birthday without being just a little bit adaptable [rolls eyes heavenwards].

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