When you pick up a child, what side do you hold them on? If you're like 70 to 85 percent of women, it's the left side, regardless of which hand is dominant. The same is true of many mammal species. According to authors of a 2017 study, it's all about a mother's brain.
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Key Facts In This Video
Negative reactions often emerge from an overwhelmingly positive emotion; it's called a dimorphous expression. 00:53
Dimorphous expressions may be a way to normalize your emotional state after intense emotional episodes. 01:33
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