Learn more about a newly observed insect behavior in which smaller ants clean larger ants.

On a dry day in Madagascar, hissing cockroaches do something unexpectedly sweet: they huddle together in slow-moving bundles of roach cuddles. A new study in Ethology shows these clusters aren't ...

(A) Maze channel design, (B) guiding electric stimulation, (C) punishing electric stimulation, and (D) punishing heat stimulation. The lower-right image is a thermal image of the maze surface. The ...