[https://www.youtube.com/watch?v=rHJDmMSKlHM](Vide... ...a biologist and the host of the PBS program It's Okay to Be Smart , reviews the evidence. For a long time, scientist...
https://www.neatorama.com/2015/10/27/Do-Animals-Mourn-Their-Dead/
Do Animals Mourn Their Dead?...
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