Why it is in the news
On 5 October 2026, the Nobel Assembly at Karolinska Institutet awarded the 2026 Nobel Prize in Physiology or Medicine jointly to Karl Deisseroth (Stanford University and Howard Hughes Medical Institute, USA), Peter Hegemann (Humboldt University of Berlin) and Georg Nagel (University of Würzburg, Germany) "for their discoveries concerning light-gated ion channels and optogenetics" — a technique that switches selected nerve cells on or off with light.
The exam angle
Thesis: Optogenetics shows how fundamental research on an obscure organism can create a transformative technology, but turning a laboratory tool into therapy depends on solving gene-delivery, safety and ethical challenges.