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The National Weather Service warns of "life-threatening wind chill" in the North and Central U.S. On top of the extreme temperatures, heavy snow is expected Sunday in parts of the Midwest.

Scientists developed the most comprehensive description yet of how lifeforms evolved and are related. Learn more in this HowStuffWorks Now article.

Cabin Fever

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Brrrrrrrrrrrrrrrrrrrrr … Indiana Weather

Cabin Fever