AUTHOR=Drucker Caroline B. , Brannon Elizabeth M. TITLE=Commentary on: “Number-space mapping in the newborn chick resembles humans' mental number line” JOURNAL=Frontiers in Psychology VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2015.00352 DOI=10.3389/fpsyg.2015.00352 ISSN=1664-1078