In this issue:
"The Case of the Sleeping Slayer": The mind’s delirium can turn tragically real in the neurological netherworld between sleep and wakefulness.
"Mind in Motion": The idea of paralyzed people controlling their limbs by thought is no longer a fantasy.
"Machines of the Infinite": A machine’s ability to quickly answer yes-or-no questions could affect everything from national security to the limits of human knowledge.
"The Great Climate Debate": How far we can push the planet?