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- Many Animals Can Count https://www.nytimes.com/2018/02/05/science/animals-count-numbers.html?action=click&contentCollection=science&contentPlacement=3&module=package&pgtype=sectionfront®ion=rank&version=highlights 72 comments
- Animals count and use zero. How far does their number sense go? « Many species have displayed a capacity for abstraction that extends to performing simple arithmetic, while a select few have even demonstrated a grasp of the quantitative concept of “zero”. » https://www.quantamagazine.org/animals-can-count-and-use-zero-how-far-does-their-number-sense-go-20210809/ 31 comments math