Research team reports how, when life on Earth became so big

In 3.5 billion years, life on earth went from single microscopic cells to giant sequoias and blue whales. Scientists have now documented quantitatively that the increase in maximum size of organisms was not gradual, but happened in two distinct bursts 'tied to the geological evolution of the planet,' said Michal Kowalewski, professor of geosciences at Virginia Tech...

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