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Thursday, 10 October 2019

Honeybees are math stars

Start thinking about numbers and they can become large very quickly. The diameter of the universe is about 8.8×1023 km and the largest known number—googolplex, 1010100—outranks it enormously. Although that colossal concept was dreamt up by brilliant mathematicians, we're still pretty limited when it comes to assessing quantities at a glance. 'Humans have a threshold limit for instantly processing one to four elements accurately', says Adrian Dyer from RMIT University, Australia; and it seems that we are not alone. Scarlett Howard from RMIT and the Université de Toulouse, France, explains that guppies, angelfish and even honeybees are capable of distinguishing between quantities of three and four, although the trusty insects come unstuck at finer differences; they fail to differentiate between four and five, which made her wonder. According to Howard, honeybees are quite accomplished mathematicians. 'Recently, honeybees were shown to learn the rules of "less than" and "greater than" and apply these rules to evaluate numbers from zero to six', she says. Maybe numeracy wasn't the bees' problem; was it how the question was posed? The duo publishes their discovery that bees can discriminate between four and five if the training procedure is correct in Journal of Experimental Biology.