Mini-Brains Allow Scientists to Study Brain Disorders

This is your bedbug-size brain on drugs. Researchers at Johns Hopkins University in Baltimore are growing "mini-brains" — smaller than the period at the end of this sentence — that may contain enough human brain cells to be useful in studying drug addiction and other neurological diseases. Labs from around the world have been racing to grow these and other organoids — microscopic, yet primitively functional versions of livers, kidneys, hearts and brains grown from real human ce