Cold noses provide hot take on social cognition.

Brügger et al. (Science Advances, 7, eabc8790, 2021) recently introduced the use of remote thermography to investigate how monkeys process socially significant vocalizations. This is a welcome addition to the arsenal of comparative psychologists. Interpretative issues abound, but the ability to non-invasively measure physiological responses that do not immediately result in overt behavior opens interesting lines of investigation.