A new study reports evidence that Earth’s most destructive natural events may occur in a recurring cycle of about 27 million years. The reporting describes the “cycle” as a hidden pattern that links major disasters across deep time, suggesting that catastrophic episodes may not be random. The sources state that the work identifies timing regularities for large-scale events and interprets them as implying periodicity in when major disruptions tend to happen. One outlet also frames the findings as raising the possibility that humanity could be near another such period, though the reports do not provide specific details on what disaster type(s) would be expected or when, beyond the broad recurrence interval. The articles focus on the claim of regular timing rather than on a consensus explanation for the mechanism behind the cycle. Overall, the sources present the study as proposing a new way to view the timing of Earth’s greatest disasters, while the implications are described in terms of the estimated recurrence period.