A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...
Kunhardtia rhodantha is in the family Rapateaceae, which is a family almost endemic to the Americas. This material relates to a paper that appeared in the 22 Dec. 2017, issue of Science, published ...
Around 1750, the British mainland American colonies had ... of white colonists resided in the North, but the majority of black people lived in the South, driving agricultural economies based ...
North America is the third largest continent in the world. It is located in the Northern Hemisphere. The north of the continent is within the Arctic Circle and the Tropic of Cancer passes ...
Outbreaks of the stomach flu are spreading across the U.S and are far higher than average for December over the past 12 years ...
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