Thors Hans Hansson (born 1950), is a Swedish physicist working as a professor of theoretical physics at Stockholm University, who was also the head of Nordita.
[2] Hansson received a PhD in 1979 at University of Gothenburg with a doctorate in Elementary particle (quarks).
He is active in the popularization of physics and science by including lectures, articles in newspapers and in Folkvett.
Hansson was elected as a member of the Royal Swedish Academy of Sciences in 2009.
His use of a cinnamon bun, a bagel, and a pretzel (to explain relevant topological ideas) was featured in many news reports of the announcement.