Author Jon Krakauer posted "How Chris McCandless Died: An Update" Wednesday at The New Yorker online with the fifth theory he has put forward since 1993 to justify his claim that the young man did not die of reckless behavior but of poisoning.
When you learn something new -- a sequence of letters, for example -- an ancient structure known as the midbrain sends squirts of the chemical dopamine to your prefrontal cortex, effectively tagging the new information as "for your immediate attention."
The human race will be around in a hundred years, even if oil won't -- in a big way at least. We will have long gone back to living off the land by that point, just as we did before the modern industrial revolution changed life seemingly irrevocably.
Any seasoned salesperson will describe a sales-positive customer in the following terms: relaxed, focused, high-trust, happy. The question is, can salespeople consciously create these biochemically-induced states?