opossummypossum:

In spite of their apparent primitiveness and small brain size, opossums have a remarkable capacity to find food and remember where it was found. When tested for their ability to remember, opossums scored better than rats, rabbits, dogs, and cats but did not score as well as humans. Opossums can remember the taste of noxious or toxic substances even a year after a single encounter.

Visual discrimination tests have shown that the opossum can learn to discriminate black versus white, different colors, patterns, and geometric forms. Additional studies designed to measure the opossum’s ability to solve maze problems indicate that mature opossums were superior to most species (rats, cats) in maze learning tasks.

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