For the past decade, scientists have been using stem cells to grow organoids that mimic the structure and cell types of our own brains. They use the organoids to study diseases and evaluate drugs. But now the research is entering a new chapter: The organoids are becoming more sophisticated as their uses expand to precision medicine and maybe even computing. #Science #brain #stemcell #biology #brainorganoids #bioethics #wsj #wallstreetjournal #thewallstreetjournal