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Over 1 Trillion Species May Live on Earth, Study

We may only be aware of one one-thousandth of one percent of all the species on Earth, according to a study which set out to calculate the number of microbial species on the planet Writing in the Proceedings of the National Academy of Sciences, researchers from Indiana University at Bloomington, looked at databases of microbial, plant and animal life to come to their conclusion. "Estimating the number of species on Earth is among the great challenges in biology," said Jay...

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