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Fighting Killer Worms

Bloodsucking worms called schistosomes are among the world's most worrisome human parasites. A new genome sequence and powerful genetic tools promise to help crack their secrets

By Patrick Skelly

Hooked from the First Cigarette

New findings reveal that cigarette addiction can arise astonishingly fast. But the research could lead to therapies that make quitting easier

By Joseph R. DiFranza


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May 2008

Beyond XX and XY

Biology. Identity. Equality.