The brain is an evolutionary marvel. By shifting the control of sensing and behaviour to this central organ, animals (including us) are able to flexibly respond and flourish in unpredictable environments. One skill above all – learning – has proven key to the good life.
But what of all the organisms that lack this precious organ? From jellyfish and corals to our plant, fungi and single-celled neighbours (such as bacteria), the pressure to live and reproduce is no less intense, and the value of learning is undiminished.
