This is the moment Dr Karl Deisseroth told his children that he had won the Nobel Prize.
Stanford University shared footage of Dr Deisseroth telling his two daughters and sons of his incredible achievement, as they embraced their father.
The 54-year-old professor shared the medicine prize with two researchers in Germany for their work in optogenetics, a field that combines light with genes to switch neurons on and off in living brains.
He took the call from the Nobel Assembly overnight, then asked for an hour-long break at 6:30am to make his children's school lunches and tell them the news.
