GM claims that by orienting the cell geometry in an "Inverted- U" shape, the battery cell experiences better heat dissipation. This aids in longevity and charging performance, and could also ...

In some cases there was a U-shape. But more often we observed an inverted U-shape, where middle-aged adults reported the highest level of happiness, or no significant age-related trend at all.

More often, though, it is more or less flat, or even an inverted U-shape over the course of one's life―where happiness increases into middle age, and then declines in later life. Understanding ...