| http://www.w3.org/ns/prov#value | - G. Shohat-Ophir, K R. Kaun, R. Azanchi, H. Mohammed, and U. Heberlein Science , 335:1351-5 (2012)doi:10.1126/science.1215932 The brain's reward systems reinforce behaviors required for species survival, including sex, food consumption, and social interaction.
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