If You Ever Feel Lazy Or Dull,

To A Space Alien Or A German Shepherd Dog, Two Humans Would Be Indistinguishable, Just As Attractive And Unattractive Space Aliens And German Shepherd Dogs Are Difficult For You To Tell Apart.

As Carl Jung Put It, "in Each Of Us There Is Another Whom We Do Not Know." As Pink Floyd Sang, "there's Someone In My Head, But It's Not Me."

One Of The Most Impressive Features Of Brains - And Especially Human Brains - Is The Flexibility To Learn Almost Any Kind Of Task That Comes Its Way.

The Left Hemisphere Acts As An "interpreter," Watching The Actions And Behaviors Of The Body And Assigning A Coherent Narrative To These Events. And The Left Hemisphere Works This Way Even In Normal, Intact Brains. Hidden Programs Drive Actions, And The Left Hemisphere Makes Justifications. This Idea Of Retrospective Storytelling Suggests That We Come To Know Our Own Attitudes And Emotions, At Least Partially, By Inferring Them From Observations Of Our Own Behavior.

When A Male Vole Repeatedly Mates With A Female, A Hormone Called Vasopressin Is Released In His Brain. The Vasopressin Binds To Receptors In A Part Of The Brain Called The Nucleus Accumbens, And The Binding Mediates A Pleasurable Feeling That Becomes Associated With That Female. This Locks In The Monogamy, Which Is Known As Pair-bonding. If You Block This Hormone, The Pair-bonding Goes Away.