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SAfrican cold snap spells tragedy for Europe-bound swallows
Johannesburg (AFP) April 9, 2008 Tens of thousands of starving swallows simply dropped dead out of the sky in South Africa's Limpopo province after a cold snap stopped them feeding, an expert said Wednesday. The birds fell victim to plunging temperatures towards the end of March and were unable to feed properly as they prepared for their annual migration to Europe, Gerhard Verdoorn from BirdLife South Africa told the SAPA news agency. "The tens of thousands of birds were falling down everywhere and just dying," Verdoorn said, adding that farmers in Limpopo had at first feared the birds were being poisoned. The dead swallows were only a small proportion of the mass migration which began on March 28, said the expert. Verdoorn suggested that humans could try and prevent what was becoming an annual tragedy by addressing the root causes of climate change. Related Links Darwin Today At TerraDaily.com
Evolution On The Table Top
Washington DC (SPX) Apr 09, 2008Evolution has taken another step away from being dismissed as "a theory" in the classroom, thanks to a new paper published this week in the online open-access journal PLoS Biology. The research article, by Brian Paegel and Gerald Joyce of The Scripps Research Institute, California, documents the automation of evolution: they have produced a computer-controlled system that can drive the evolution of improved RNA enzymes-biological catalysts-without human input. |
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