Scientists have grown human brain tissue to fill most of a mouse’s cortex, creating a new model for studying brain disease and neural circuits.

Nature, Published online: 11 September 2026; doi:10.1038/d41586-026-02828-3

Small trial hints at regenerative potential of bone-seeking marrow cells.

A new generation of therapies aims to intervene at a recently discovered gap between the disease’s molecular march and its neurological consequences.