Chemicals from our phone and TV screens are accumulating in the brains of endangered dolphins and porpoises. New research shows these "liquid crystal monomers" from e-waste can cross the blood-brain barrier and may disrupt DNA repair, highlighting the growing impact of electronics on marine life.

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Mark SavageMusic correspondent

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Lizzy Yarnold

Close relatives of animals can become multicellular if distinct individuals join together or if dividing cells remain attached. A species has been found to use both mechanisms.