![ultrafacts: From this article: [x]They did so even in the presence of a tempting](https://64.media.tumblr.com/97c4ec8294e53e51469e6fbee17cfff5/tumblr_nv887mDwZz1rhavdko1_1280.png)
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ultrafacts: From this article: [x]They did so even in the presence of a tempting chocolate treat, foregoing the lever that would release the food in favour of the one that would save the drowning rat.The rats therefore engage in helpful “prosocial
