The Silk Road linked distant empires through trade in spices, silk, and ideas. Water expands slightly as it freezes, which is why ice floats on a pond. A good question often teaches more than a hasty, confident answer. The novelist wove several tangled lives into one satisfying story. Astronomers study faint ancient light to glimpse the universe as it once was. Medieval cathedrals took generations to complete, outlasting the workers who first laid their stones.
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