It is now 95% complete and is continually being updated as new species are discovered.

ENGADGET: Scientists estimate at least one third of marine species remain unknown to humans

Topics are created by users and continually revised and updated so that similar topics are unified to avoid the kind of answer bloat that befell Yahoo Answers and Answers.com.

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Keep watching this section for continually updated analysis on our blog and new articles and features.

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First promulgated in 1974, updated in 1986, and in its present version in 2005, these guidelines continually evolve as more information develops.

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