Ant fun fact!- ants are not affected by old age like humans are! In elderly humans, the levels of two brain chemicals, serotonin and dopamine, plummet. Low levels of serotonin causes memory loss and inability to learn, while dopamine affects physical movement as well as learning. However, old ant workers showed no dip in these chemicals. What do all these results mean? Age has no effect on ant behavior. Old workers had just an acute sense of smell as younger ones. They were strong enough to walk great distances looking for food. Back in the nest, they are better nurturers of larvae, nimbly cleaning eggs and feeding larvae. These workers work till the last weeks of their life.