Biologists (and some women) have long puzzled about why evolutionary selection, known for its ruthless efficiency, allows men to exist. Here's why.
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via Health and Medical NewsHealth and Medical News Pfizer Inc has already had its takeover overtures rebuffed three times by rival AstraZeneca Plc, but investors in the U.S. drugmaker say it can tolerate a little more rejection before going hostile with the deal. AstraZeneca turned down a sweeten...
