THE connection between an 18th-century savant called Joseph-Louis Lagrange and the problem of landing safely at Hong Kong International Airport may not, at first, be obvious. But there is one. Hong Kong airport is notorious for rocky and sometimes aborted landings caused by the disturbed air flow from nearby mountains. Though laser technology is deployed alongside its runways to monitor changes in wind speed and thus forewarn pilots, that is often not enough. What is needed is a better understanding of the theory of the winds themselves.

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Those who adhered to the ancient faith now withdrew; some, forsaking their native Alps, raised the banner of truth in foreign lands; others retreated to the secluded glens and rocky fastnesses of the mountains, and there preserved their freedom to worship God.

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The park includes the glaciers of the Columbia Icefield, hot springs, lakes, waterfalls and, of course, mountains. Wildlife in the park include elk, moose, mountain goat, bighorn sheep, grizzly bear, black bear, beaver, Rocky Mountain pika, hoary marmot and caribou.

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