From the invisible forces shaping our universe to the enigma of consciousness right inside our own heads, these 25 unsolved mysteries that haunt modern science represent the bleeding edge of human ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

One question in computer science has stood above the rest for decades, resisting every attempt to settle it despite its enormous implications. At the center of the mystery is a deceptively simple idea ...