Flying toward the east tends to produce more jet-lag for travelers than flying toward the west. A team of researchers have developed a model of the part of the brain that handles the body's circadian rhythm that may explain this asymmetry. Using non-linear dynamics they studied how variations in the behavior neurons in the suprachiasmatic nucleus are affected differently by the different travel directions.
Paper:http://scitation.aip.org/content/aip/journal/chaos/26/9/10.1063/1.4954275
Article:http://scitation.aip.org/content/aip/magazine/physicstoday/news/10.1063/PT.5.7291
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