A new study found that oxytocin, usually thought to strengthen emotional bonds, also increases people's envy and schadenfreude. An earlier study found it made female hamsters more aggressive towards intruders. No word on what it does to rabbits. [NewScientist]
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Oh it's just a hamster, you say. Didn't you see its sharp pointy teeth!? When it smiled at you with all that schadenfreude?