This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American In the second half of the 19th century, ...

Does something like "free will" really exist? We often take it for granted, but philosophers, psychologists and neuroscientists have debated the issue for decades—if not centuries. In his recent Ph.D.

In his response to my letter about the 1983 Libet experiment (1 September, p 24), Chris Frith asks two questions: What triggers the action demanded by the experiment, and why the report of the ...