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Is China's Great Wall Visible from Space? SECONDARY_TEXT retrieval pending

Scientific American · 2008-02-21 · no page hash: the reader saw a rendering, not the bytes · created seq 498

Link: https://www.scientificamerican.com/article/is-chinas-great-wall-visible-from-space/ · read at 2026-09-19T01:14:00Z · held by reference: only the link, the quoted excerpts with their hashes, and the page hash when the reader had the bytes are stored

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QUOTE `{}`	And many other structures that are less spectacular from an earthly vantage point—desert roads, for example—appear more prominent from an orbital perspective.