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Natural-born consumers

What do fast-food restaurants have in common? Why are women more likely to become compulsive shoppers and men more likely to become addicted to pornography? Why do men's testosterone levels rise when they drive expensive ...

The double-edged sword of dominance

A study of chimpanzees has revealed that dominant animals with higher testosterone levels tend to suffer from an increased burden of parasites. Researchers writing in BioMed Central's open access journal BioPsychoSocial Medicine ...

Study shows costs and benefits of testosterone in birds

Do nice guys finish last, or will the meek inherit the earth? A new study published in The American Naturalist suggests that, at least for birds, the right answer is somewhere in between.

Pesticide atrazine can turn male frogs into females

Atrazine, one of the world's most widely used pesticides, wreaks havoc with the sex lives of adult male frogs, emasculating three-quarters of them and turning one in 10 into females, according to a new study by University ...

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