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Waterfall in the Walter Sisulu National Botanical Garden, formerly the Witwatersrand National Botanical Gardens.Waterfalls like this, cascading over a 56-kilometre-long (35 mi) quartzite ridge in Gauteng gave rise to the name “Witwatersrand”, which means “white water ridge” in Afrikaans.

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is much cheaper, more efficient, and more environmentally friendly than other extraction processes. So far the bacteria used in mining are collected from mining areas where they occur naturally. Because biomining has become so lucrative, the next step is to create super–mining microbes through genetic engineering to make them more efficien

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Education rules concerning Texas Essential Knowledge and Skills (curriculum standards) for middle school social studies

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Floating Continent - TV Tropes

The Culture, by Iain Banks: . In The Player of Games, one character, whose job is to build Orbitals (artificial ring-shaped worlds), talks about making Floating Continents because she thinks that orbitals are too mundane, having fairly standard planetary ecosystems and landforms.

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