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Friday, July 13, 2007

 

Butterfly shows evolution at work

‘Scientists say they have seen one of the fastest evolutionary changes ever observed in a species of butterfly.

The tropical Blue Moon butterfly has developed a way of fighting back against parasitic bacteria.

Six years ago, males accounted for just 1% of the Blue Moon population on two islands in the South Pacific.

But by last year, the butterflies had developed a gene to keep the bacteria in check and male numbers were up to about 40% of the population.’




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