Cockroaches Have a 'Collective Memory' That Emerges From Their Social Networks

Researchers found that American cockroach groups can keep returning to an initially favored shelter even after lighting conditions are reversed.

The behavior appears to come from simple social rules: each cockroach stays near others, and the group structure reinforces the original choice.

Simulations showed this memory-like effect can emerge without any individual cockroach actually remembering the past.

The study, published in PLOS One, highlights how social interactions alone can preserve past decisions in animal groups.