人类只“看清”了0.001%的海底

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You've probably heard this before： We understand more about outer space than we do about the deepest depths of Earth's oceans. But knowing this and actually thinking about the numbers are another thing entirely. Roughly 70 percentofthe planetiscovered in ocean，and there'sfarmore life in it than the cumulative organisms on land. Scientists estimate there are somewhere between 700，0o0—1 million species living in the approximately 360 million square kilometers of water.After centuries of exploration， we've only catalogued about a third ofthose creatures.

你可能听过这样一句话：我们对外太空的了解比对地球海洋深处的了解还要多。（剩余2227字）