| web | https://www.npr.org/sections/health-shots/2017/11/23/566034172/human-brains-have-evolved-unique-feel-good-circuits |
| author | Jon Hamilton |
| publication | NPR |
| date | 2017-11-23 |
| web | André M. M. Sousa, Ying Zhu | Science | 2017-11-24 |
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