Midway through “Explorations in the Icy North,” Nanna Katrine Lüders Kaalund writes, “Science in the Arctic was shaped not only by the training and abilities of the explorers, but also by interaction ...

It was a little more than a day into his return to the milk delivery business last month that Bradley Hellert, 64, found himself with a dilemma. His 20-year-old milk truck had died on the side of the ...