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Practice Speaking: Read Aloud
ID: #51813
Long Underground Microbes
Instructions
Look at the text below. In 40 seconds, you must read this text aloud as naturally and as clearly as possible. You have 40 seconds to read aloud.
Precambrian cratons some of Earth's oldest rocks were uninhabitable for microbes for much of their existence, with the longest period of habitability not much beyond a billion years, and many only for the past 50 million to 300 million years, according to a paper correlating Earth's deep biosphere with geologic history.
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