Optogenetics involves controlling nerve signals with light, and helps researchers understand how specific cell types contribute to behaviours like learning, fear, addiction and movement. The trio were honoured "for their discovery of a molecular switch for nerve cells", the Nobel Assembly said

Former PM Magdalena Andersson’s centre-left Social Democrats emerged as the largest single party with 99 seats, despite losing eight seats compared with the 2022 election. Andersson now faces the task of navigating differences within the opposition bloc as she seeks to form a government