Stingrays (left) and cichlids - can perform simple additions and subtractions in the number range up to 5.
Stingrays ( left ) and cichlids - can perform simple additions and subtractions in the number range up to 5. Photo: Vera Schlüssel/University of Bonn . Researchers at the University of Bonn publish an unexpected finding Cichlids and stingrays can perform simple addition and subtraction in the number range of one to five. This has been shown in a recent study by the University of Bonn, which has now been published in the journal Scientific Reports. It is not known what the animals need their mathematical abilities for. Suppose there are some coins on the table in front of you. If the number is small, you can tell right away exactly how many there are.
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