Intelligence, in most people's conception, involves combining pieces of evidence to reach non-obvious conclusions. A recent theoretical study shows that intelligence-like brain functions can emerge from simple neural circuits, in this case the honeybee mushroom body.
Caron, S., & Abbott, L. F. (2017, March 20). Neuroscience: Intelligence in the Honeybee Mushroom Body. Current Biology. Cell Press. https://doi.org/10.1016/j.cub.2017.02.011