Robots help to answer age-old question of why fish school

A fish school is a striking demonstration of synchronicity. Yet centuries of study have left a basic question unanswered: Do fish save energy by swimming in schools? Now, scientists from the Max Planck Institute of Animal Behavior (MPI-AB), the University of Konstanz, and Peking University have provided an answer that has long been suspected but never conclusively supported by experiments: yes.

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