Add Yahoo as a preferred source to see more of our stories on Google. Talk may be cheap, and actions may speak louder than words. Nevertheless, rhetoric matters. It arouses passions, noble and base.

Some of the most complex cognitive functions are possible because different sides of your brain control them. Chief among them is speech perception, the ability to interpret language. In people, the ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Noam Chomsky’s political views attract so ...