By Rebecca Fine
I'm sure you've plinked a stone into a pond and watched the ripples spread out from the center. Or seen a boat plow through a lake or harbor, a massive vee of wavelets widening behind it.
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By Rebecca Fine
In the days of the mighty sailing ships, when brave souls voyaged into the unknown, dependent on the winds and their as-yet incomplete knowledge of geography and navigation, one of the greatest and most dangerous challenges was to traverse the area known as "the doldrums.
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