Cup-stacking Otter

Nellie the sea otter lives at Point Defiance Zoo & Aquarium in Tacoma, Washington. The otters are given toys for entertainment and enrichment, and here you see Nellie stacking them back in order, after which she hands them back to her keeper. Before you know it, our factory robots will be replaced with otters, who will work for clams. That is, until they tire of the novelty and just want to float in the water, holding hands with a friend. (via reddit)