larger brain = smarter


larger brain = clever


animals with bigger brains relative to body size are smarter! researchers visited 9 zoos in the States and let 140 animals to solve a problem. they put the animals’ favorite food in a metal case and allow 30mins for them to work on it. 23 out of 39 spices were able to get the food out; bears got the highest successful rate while none of the meerkats could complete the task.

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