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The word 'dark' is used in titles because the articles are about the nature of dark matter and dark energy, which are widely accepted terms. You would have to g
by jetrink 8y ago
The word 'dark' is used in titles because the articles are about the nature of dark matter and dark energy, which are widely accepted terms. You would have to go out of your way not to use the word dark when talking about these subjects and it would make titles less descriptive.