Earth
First evidence that bird flu is spread sexually
Bird flu may be a sexually transmitted infection, at least in ducks – and the less well-endowed the male, the greater the chance of spreading the virus
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Bird flu may be a sexually transmitted infection, at least in ducks – and the less well-endowed the male, the greater the chance of spreading the virus
The tree of life, one of the iconic concepts of evolution, has turned out to be a figment of our imagination