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Where's your sense of adventure? Start with these smart reads from the week, including sex and the meaning of life, what happy couples do, how puppies learn, and more.

Sex Gives Meaning to Life

By David Ludden Ph.D.

The One Thing Happy Couples Do

By Wendy L. Patrick, Ph.D.

Health Care Around the World

By Benjamin Radcliff Ph.D.

A Test of Wills

By Joachim I Krueger Ph.D.

The Lifeblood of Economies

By Nigel Barber Ph.D.

How Puppies Learn

By Stanley Coren PhD., DSc, FRSC