Animal psychologists have found that giraffes can mentally combine small sums of objects, but can't perform the subtractive equivalent.

In addition to humans, some species of primates and birds have demonstrated under experimental conditions their ability to ...

(soft music) (soft music) (air whooshes) (soft music) (soft music) (soft bells ringing) (soft music) (cartoons speaking gibberish) - [Children] Math Mights. - Hi, Kindergarten Math Mights. Thanks for ...