Full Text:
A solitary wasp--the kind that lives and forages for food alone--has a fairly small brain. Type out a lowercase letter in 10-point text and you'll get an idea of its size. But tiny as that brain is, its social cousins, living together in honeycombed nests, have even smaller ones. And that size difference might provide some key information about the difference between insect societies and vertebrate societies.
Image credit: Sean O'Donnell, Drexel University
