How Long can Animals Remember?

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Memory is one of the most fascinating aspects of intelligence, but how long do different animals remember? In this video, we compare the memory abilities of octopuses, crows, humans, goldfishes, chimpanzees, dogs, elephants, and dolphins—revealing the surprising ways they store and recall information.
How Do Scientists Measure Animal Memory?
Researchers test memory in animals through various experiments:
Delayed recall tests: Animals are trained to perform a task, then tested after hours, days, or even years.
Recognition tests: Animals recognize individuals, objects, or places they haven't seen for a long time.
Problem-solving memory: Some species remember how to solve puzzles after long intervals.
Unlike other animals, humans have episodic memory, allowing us to recall specific life events in detail, essentially giving us a lifetime memory.