Browse Reference Articles
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Natural gas
Natural gas, commonly referred to as gas, is a gaseous fossil fuel consisting primarily of methane. It is found in oil fields and natural gas fields, as well as—in smaller quantities—in ... > more -
Energy and the Environment
Renewable Energy
Solar Energy
Geomagnetic Storms
Environmental Science
Sustainability
Solar power
Solar power (also knows as solar radiation or insolation) is energy from the sun. This energy, in the form of heat and light, supports all life on Earth, drives the Earth's climate and weather and is ... > more -
Geology of the Alps
The Alps form a part of a Tertiary orogenic belt of mountain chains along the southern margin of the continents Asia and Europe, called the Alpide belt. This belt of mountain chains was formed during ... > more -
1906 San Francisco earthquake
The San Francisco earthquake of 1906 was a major earthquake that struck San Francisco and the coast of northern California at 5:12am on Wednesday, April 18, ... > more -
Whale shark
The whale shark (Rhincodon typus) is a distinctively-marked member of the subclass Elasmobranchii of the class Chondrichthyes. It is the largest shark and also the largest ... > more -
Cretaceous
The Cretaceous period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic period, about 146 million years ago (Ma), to the beginning of the Paleocene epoch ... > more
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