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In the December 5 Issue:
- TABLE OF CONTENTS
- Climate might be right for a deal: Copenhagen negotiations will take steps toward a climate-stabilizing treaty
- Botanical Whales: Adventures in the Tortugas reveal that seagrass fields need saving too
- Breaking the Speed Limit: Studies examine physiology and technology to better foresee the ultimate edge of human performance
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Wandering and wondering
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The brain's default mode network -- a series of connected areas that work hardest when most of the brain is at rest -- is active during daydreaming and mind-wandering. Many scientists believe the default network has two major hubs, one in the posterior cingulate cortex with the precuneus and one in the medial prefrontal cortex (shown above).
Credit: Network overlay: Olaf Sporns/Indiana Univ. (modified by J. Korenblat); Brain photo: Omikron/photoresearchers
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