Bold predictions about the future in The Singularity is Near: When Humans Transcend Biology, recently released by legendary inventor Ray Kurzweil, are causing reviewers to marvel in awe or disbelief. But while Kurzweil’s forecasts are fascinating, the book’s analysis of the present is just as important.

Amid discussions of reverse engineering the brain and the possibility of tiny nanobots that will help keep us healthy, Kurzweil points out stumbling blocks to our brave march into the future.

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