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Publisher's Summary

In this issue:
“Does the Multiverse Really Exist?": Proof of parallel universes different from our own may still lie beyond the domain of science.
"The Evolution of Grandparents": Senior citizens may have been the secret to our species’ success.
"How to Build a Better Learner": Brain studies suggest new ways to improve reading, writing, arithmetic, and even social skills.
"How New York Beat Crime": The Big Apple became a model on how to stem homicides, muggings and other ills.
©2011 Scientific American
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