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It's official: There's a swine-flu pandemic

The World Health Organization has officially declared a swine-flu pandemic. While somewhat anti-climactic from a news perspective, the action does promise to spur accelerated development of a vaccine against the H1N1 variant influenza strain that has, to date, caused some 27,000 cases worldwide, the majority of them in Mexico and the U.S.

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Sex biology redefined: Genes don’t indicate binary sexes

The scenario many of us learned in school is that two X chromosomes make someone female, and an X and a Y chromosome make someone male. These are simplistic ways of thinking about what is scientifically very complex.