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First up: We live in a world run by complicated systems. And the failure to understand those systems can have pretty dire consequences.

Then: What\\u2019s that one song you keep listening to on repeat? Turns out, that tune could be used as therapy to improve your quality of life as you get older.

Finally: It might seem like rich people don\\u2019t have a care in the world, but sociology professor Rachel Sherman found that some 1 percenters feel uneasy about publicly displaying their wealth.