April 23 (UPI) --For the first time, scientists have produced a comprehensive map of the tectonic stresses acting on the North American continent. In the short term, the map of North American faults - ...

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Scientist Kirk Johnson, who grew up in the Seattle area, is the host of Nova’s “Making North America,” a three-part series that debuts Nov. 4 on PBS stations nationwide. Credit: PBS. There is no such ...

Disregard what you learned in geography class—Earth may not have seven continents after all. From the earliest of grades, schoolchildren around the world have memorized the same lineup: Africa, ...

The prairie grass of North Dakota can look like it's waving hello, but even the geese just fly right over. North Dakota is not only one of the least-visited states, it's also one of the last on a ...

The world has seen great change since the end of the Cold War. For much of the past two millennia, political, military, and economic strength has been based in Eurasia. And, since the 1500s, mostly in ...

Forests take up 25 - 30 percent of human-caused emissions of carbon dioxide -- a strong greenhouse gas -- and are therefore considered to play a crucial role in mitigating the speed and magnitude of ...

Introduction -- North American amphibians -- The North American Continent -- Glaciation -- Climate and amphibian distribution -- Frogs of North America -- Family Ascaphidae -- Family Bufonidae -- ...