Life-changing Chemicals

Methicillin-resistant Staphylococcus aureus (MRSA), in green, with human cell, grey.
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Lessons from the Flu

As flu season approaches each year, thousands line up to receive a vaccine—but many others don't.
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Changing the World Gene by Gene

Here’s the skinny: evolution is happening all the time, all around us. Living things are like one roiling mass of DNA. OK, so that’s a little over the top.