B.

In 1979, a secret unit was established by the most gifted minds within the US army. Defying all known accepted military practice - and, indeed, the laws of physics - they believed that a soldier could adopt the cloak of invisibility, pass cleanly through walls and, perhaps most chillingly, kill goats just by staring at them. Entrusted with defending America from all known adversaries, they were the First Earth Battalion. And they really weren't joking. What's more, they're back and fighting the War on Terror.

Will increased scientific understanding of our brains overturn our beliefs about moral and ethical behavior? How will increasingly powerful brain imaging technologies affect the ideas of privacy and of self-incrimination? Such thought-provoking questions are rapidly emerging as new discoveries in neuroscience have raised difficult legal and ethical dilemmas. Michael Gazzaniga, widely considered to be the father of cognitive neuroscience, investigates with an expert eye some of these controversial and complex issues.