24 years ago, physicist Wolfgang Ketterle left Germany for what he thought would be a fairly brief stint as a post-doc at the Massachusetts Institute of Technology in Boston. In 2001, he was awarded the Nobel Prize in Physics for his work with gases at ultra-low temperatures. And he still lives in Boston and still works at MIT.
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Why did he turn his back on Germany? How does he feel about the quality of research going on in his home country? We met the researcher a the World Economic Summit in Davos to find out more.