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FEATURE ARTICLE
The process of turning thoughts into speech changes with age
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ALSO IN THE CURRENT ISSUE
Macroscope:
Winners and Losers in the Animal-Research War
Violent attacks on scientists and their families are becoming more frequent
Computing Science:
Wagering with Zeno
A philosopher who did everything by halves may never win, but he won't go broke
Book Review:
Variations on a Theme
A review of Your Inner Fish: A Journey into the 3.5-Billion-Year History of the Human Body, by Neil Shubin. Shubin traces the imprint of our fishy ancestors on our anatomy and recounts some of the highlights of his career
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ONLINE FEATURES
The University of New Brunswick's Earth Impact Database catalogs 174 impact structures around the world
Sociologist Harry Collins ponders expertise and its role in our society
Michael Novacek, curator of paleontology at the American Museum of Natural History, shares his recent reading and favorite authors
Learn the latest science news, and keep up with American Scientist articles and book reviews—free features delivered to your electronic mailbox
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TRIVIA
What are the two definitive neuropathological abnormalities in the brains of Alzheimer's patients?
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