guard

Humans and other primates often reciprocate good deeds. A new study suggests a nonprimate, the dwarf mongoose, does so, too, even after a delay. Christopher Int…

A prototype flexible electronic mouth guard can measure lactate levels in an athlete’s saliva, tracking muscle fatigue during training and performance. Learn mo…

Wading birds in the Everglades prefer to nest near resident gators for protection. And the arrangement appears to be mutually beneficial. Christopher Intagliata…