Assertion: huge comet | /r/CapableOf | propel the earth
Facets:
value: back into an ice age
type: TEMPORAL
Source sentences:
text: A new study published in the Proceedings of the National Academy of Sciences has tried to answer the question: did a massive comet explode over Canada 12,900 years ago, wiping out both beast and man in North America and propelling the Earth back into an Ice age?