Some scientists are skeptical that cosmic impacts caused mass extinctions, citing gradual die-offs of species as evidence that climate changes due to other factors were to blame.
(Some scientists; are; skeptical that cosmic impacts caused mass extinctions) (climate changes due to other factors; were; to blame) (climate changes due to other factors; to blame; ) (cosmic impacts; caused; mass extinctions) Context(cosmic impacts caused,List([35, 56))):(cosmic impacts; caused mass extinctions citing; gradual die-offs of species as evidence that climate changes due to other factors were to blame)
cosmic impacts caused,List([35, 56))
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skeptical that cosmic impacts caused mass extinctions
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gradual die-offs of species as evidence that climate changes due to other factors were to blame