Joy (left, voiced by Amy Poehler) and Sadness (voiced by Phyllis Smith) catch a ride on the Train of Thought in Pixar's Inside Out. The movie opens in theaters nationwide June 19. Disney/Pixar hide caption

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A direct, friendly gaze seems to help cement the bond of affection between people and their pooches. Dan Perez/Flickr hide caption

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Shots - Health News

Scientists Probe Puppy Love

Research shows the mutual gazing between pooches and people spurs release of a "trust hormone" in both. The results suggest dogs really may love us back.

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Can you name the 10 emotions conveyed above? The first six are basic emotions. The last four are complex emotions that combine two of the basic ones. (Check at the bottom for the answers.) Courtesy of Aleix M. Martinez hide caption

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People drew maps of body locations where they feel basic emotions (top row) and more complex ones (bottom row). Hot colors show regions that people say are stimulated during the emotion. Cool colors indicate deactivated areas. Image courtesy of Lauri Nummenmaa, Enrico Glerean, Riitta Hari, and Jari Hietanen. hide caption

toggle caption Image courtesy of Lauri Nummenmaa, Enrico Glerean, Riitta Hari, and Jari Hietanen.

A first-year student is greeted upon arrival at University College in Utrecht, Netherlands, on August 16, 2010. Robin Utrecht/AFP/Getty Images hide caption

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Research shows that under certain circumstances, we can train ourselves to forget details about particular memories. iStockphoto.com hide caption

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