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San Andreas fault

(Encyclopedia) San Andreas fault, great fracture (see fault) of the earth's crust in California. It is the principal fault of an intricate network of faults extending more than 600 mi (965 km) from…

The Largest Earthquakes in the United States

Top of Page Source: Getty ImagesEarthquakes are powerful forces of nature that can cause great damage and destruction. Over the years, there have been several very powerful quakes that have rocked…

Origin of Life: Early Earth Environment

Early Earth EnvironmentOrigin of LifeIntroductionSpontaneous GenerationEarly Earth Environment So if Pasteur is correct and life only comes from existing life, where and how did life begin? Many…

The Seven Continents

What is a continent? A continent is defined as a large unbroken landmass completely surrounded by water, although in some cases continents are (or were in part) connected by land bridges. The…

The Great 1906 San Francisco Earthquake

Among the worst natural disasters in U.S. history by Chris Frantz San Francisco, California, April 1906 Related Links Almanac: San Francisco San Francisco Census Facts: 1906 Versus…

How Many Continents Are There?

Source: iStock Like a large jigsaw puzzle, the surface of the Earth is divided up into interlocking pieces that form the world we know today. And when it comes to the number of continents, it hasn’t…

Alaska

(Encyclopedia) CE5 AlaskaAlaskaəlăˈskə, largest in area of the United States but one of the smallest in population, occupying the northwest extremity of the North American continent, separated…