Turning brain waves into speech

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Neuroscientists have recorded the brain activity of patients while talking and used this to develop computer programmes that can simulate speech. The neural activity they monitored is associated with the muscle movements needed to talk and form words rather than the meaning of the words themselves. They say a refined version of the system should be able to generate speech for people who cannot talk. Data collected from a long running study of plankton is proving useful for research into historic ocean plastic pollution. Records of plastic accidentally entangled in the ocean going plankton samplers now provides a snapshot of contamination dating back to the 1950s. Rewilding, letting nature take its course has romantic appeal. Perhaps counter intuitively a review of methods from around the world shows the key to successful projects is often how well they interact with local people. And over 600 scientists have called for the European Union to put indigenous rights and deforestation to the fore of its trade negotiations with Brazil. We look at why they made this political call. (Picture: Researchers implanted electrodes similar to these in participants’ skulls to record their brain signals. Credit: UCSF) Presenter: Roland Pease Producer: Julian Siddle