Group decisions: When more information isn't necessarily better

In nature, group decisions are often a matter of life or death. At first glance, the way certain groups of animals like minnows branch off into smaller sub-groups might seem counterproductive to their survival. After all, information about, say, where to find some tasty fish roe or which waters harbor more of their predators, would flow more freely and seem to benefit more minnows if the school of fish behaved as a whole. However, new research published in Philosophical Transactions of the Royal Society B sheds light on the complexity of collective decision-making and uncovers new insights into the benefits of the internal structure of animal groups.

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