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Scientific American, April 2012 Periodical

Scientific American, April 2012

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Publisher's Summary

In this issue:

"First of Our Kind": Recently discovered fossils from South Africa could revise long-held ideas about how we came to be human.

"This is Your Brain in Meltdown": Neuroscientists explain why stress can make the mind turn to mush.

"Bound for the Moon": The next rover to roam the moon’s surface may come from college students and private companies working on a shoestring budget.

"Polio’s Last Act": A component of the most widely used polio vaccine now causes more disease than the virus it is supposed to fight.

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    ©2012 Scientific American

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