Mass extinctions of land-dwelling animals occur in 27-million-year cycle

Model dinosaur The lead author of the study puts the blame on “the largest cataclysmic impacts and massive volcanism, perhaps sometimes working in concert.” The study says: ‘The correlations and similar cycles in marine and non-marine extinction episodes suggest a common cause’. Note: this is a follow-up to a 2015 study with the same lead […]

Mass extinctions of land-dwelling animals occur in 27-million-year cycle

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