This summer has been extraordinarily hot and dry in much of Europe, including places where air conditioning is rare. It’s been miserable for a lot of residents and tourists, but on the positive side, a side effect has been the discovery of some important historical sites, ranging from traces of very ancient structures in Ireland to a crashed plane that had been frozen in a Swiss glacier since World War 2. The following report originally aired August 31 on PBS Newshour:

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