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Earth's Biggest Disasters Strike in a Hidden Pattern Every 27 Million Years

Summary by Science Alert
Mass extinctions. Giant volcanic eruptions. Oceans suddenly deprived of oxygen. At first glance, Earth's biggest...

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The geological cycle may link extinctions, volcanic eruptions, and other Earth events every 27.5 million years.

·Budapest, Hungary
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Throughout history, our planet has been through some catastrophes that shaped life, such as mass extinctions and volcanic eruptions of great proportions. According to a new study, all of these disasters do not occur randomly, but through a geological cycle of about 27.5 million years. The statement is part of an investigation by geologist Michael Rampino of the University of New York, in the United States. In the research, he reviewed data from …

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For decades, scientists have been trying to answer the question of whether the greatest catastrophes in Earth's history—such as mass extinctions, gigantic volcanic eruptions, and sudden climate changes—are purely random, or whether a deeper, repeatable mechanism lies behind them. A recent analysis published in the journal Evolving Earth indicates that these events may be part of a regular cycle that lasts about 27.5 million years.

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Science Alert broke the news in Canberra, Australia on Monday, July 27, 2026.
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