Back in 1980 I used a report about female whelks growing growing male attributes and being unable to breed. The culprit was in the special paint used to stop barnacles sticking to the hulls of boats. I you want to know more. Please leave a message.
The problem now is that birds go rooting about for worms in sewage farms. Because of The Pill and some dodgy practices in animal breeding Oestrogens, have become pollutants at sewage farms. Hence male bird song is becomming difficult to distinguish from their wives to be.
For the full report Please go to
http://www.world-science.net/othernews/080228_birdsong
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