Bees can link symbols to numbers, study finds

We've learned bees can understand zero and do basic math, and now a new study shows their tiny insect brains may be capable of connecting symbols to numbers.

Like monkeys, pigeons can put numbers in order

(PhysOrg.com) -- Pigeons are on par with primates in their numerical abilities, according to new University of Otago research appearing in the leading international journal Science.