Crows are able to look at a handful of four-sided shapes and correctly distinguish those that exhibit geometric regularity ... out how much they know about math. For this study, the birds would ...

Crows are able to look at a handful of four-sided shapes and correctly distinguish those that exhibit geometric regularity from those that ... are designed to tease out how much they know about math.

Two mathematicians now say they’ve made progress on a very old unsolved math problem. The problem involves a subfield called geometric measure theory, in which sets of objects are generalized in ...