It's striking to learn that 14% of U.S. adults can't read, and an additional 21% read below a 5th grade level. Given the relatively recent development of language in us humans, this may not be altogether surprising—while we began to develop linguistic abilities 30,000 to 40,000 years ago, written and spoken language only emerged around 5,000 years ago.
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Scooped by
Sakis Koukouvis
onto Science News June 2, 2013 10:36 AM
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