Cyclical catastrophe patterns mirroring biological mass extinctions

At least two major glacial cycles (complete glacial-interglacial periods) occurred within just the last 36,000 years, with transitions between glacial and interglacial periods happening in relatively short timeframes. Researchers note that cycles of societal change may mirror patterns seen in biological systems throughout deep time. Key facts claimed: The curve of civilization rise and fall mirrors the curve of biological life with similar sawtooth patterns — At least two complete glacial cycles came and went within the last 36,000 years — Transitions between glacial and interglacial periods occur in short timeframes of a couple thousand years — Some ecological changes occurred within single-digit years during these transitions — Mass extinctions in civilization history correlate with geological and cosmic events