U fiirso qoraalka hoose ka dibna ka jawaab su'aasha kadib isla luqadda qoraalka:  Wuxuu u guuray Machadka Farsamada Aragtida (kadib Machadka Niels Bohr) ee Copenhagen oo ku yaal Sheldon Traveling Fellowship oo ka yimid Harvard, wuxuuna ku hadhay Danmark. Sanadkii 1953 waxaa loo magacaabay xubin ka tirsan shaqaalaha CERN Theoretical Study Group, oo fadhigiisu ahaa Copenhagen, boos uu qabtay ilaa uu ka noqday borofisar machadka cusub ee loo yaqaan 'Nordic Institute for Theoretical Physics' (Nordita) sanadkii 1957. Wuxuu ahaa macalin booqasho ku yimid Jaamacadda California, Berkeley guga 1959. Sanadkii 1971 wuxuu noqday muwaadin deenish ah.  Su'aal: Goorma ayuu noqday muwaadin reer Denmark ah?
Sanadkii 1971