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Steven Pinker calls music "auditory cheesecake." We didn't evolve to love cheesecake specifically; we evolved to love anything sweet or high-calorie, so cheesecake is a side-effect of our evolution. Music, likewise, is a side effect of our need for language and a sense of our surroundings. 00:46
A study by neuroscientist Talia Wheeley found that we may read emotion in music the same way we read emotion in human movement. 02:20
Just as we can sense emotion by watching someone walk or dance, we can identify when a song is happy or sad. Music seems to move us because we move. 04:01