Norbert E. Yankielun, Ph D, is a former research engineer for the U.S. Army Corps of Engineers, Cold Regions Laboratory in New Hampshire. In his spare time, he conducts igloo-building workshops, which draw hundreds. His Web site is www.Doctor Why.com.
1 Ebooks oleh Norbert E. Yankielun
Norbert E. Yankielun: How to Build an Igloo: And Other Snow Shelters
How are the ice blocks of igloos so perfectly formed and fitted, and able, it’s been said, to withstand the weight of a polar bear? How can you determine if the fresh snow that’s fallen outside your …
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