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Supervolcano
A supervolcano refers to a volcano that produces the largest and most voluminous kinds of eruption on Earth. The actual explosivity of these eruptions varies, but the sheer volume of extruded magma ... > more -
Yellowstone Caldera
The Yellowstone Caldera, sometimes known as the Yellowstone supervolcano, is a volcanically active region in Yellowstone National Park. It measures 55 kilometers (34 mi) by 72 kilometers (44 mi). ... > more -
Stratovolcano
A stratovolcano is a tall, conical volcano composed of one layer of hardened lava, tephra, and volcanic ash. These volcanoes are characterized by a steep profile and periodic, explosive eruptions. ... > more -
Meteorological history of Hurricane Katrina
The meteorological history of Hurricane Katrina, an extremely destructive hurricane which was Category 5 at its peak, starts from its formation over the southeastern Bahamas as Tropical Depression ... > more -
Hurricane preparedness for New Orleans
Hurricane and flood preparedness in New Orleans has been an issue since the city's early settlement because of the city's location. Much of New Orleans was built on a delta marsh and sits below sea ... > more -
Hurricane Opal
Hurricane Opal was a major hurricane that formed in the Gulf of Mexico in September 1995. It struck the Yucatán Peninsula, then churned in the Gulf before making landfall a second time on the ... > more -
Labor Day Hurricane of 1935
The Labor Day Hurricane was a very compact, intense hurricane that formed in the North Atlantic during August 1935. It remains the strongest hurricane on record to have struck the United States, and ... > more -
Photosynthesis
Photosynthesis, generally, is the synthesis of sugar from light, carbon dioxide and water, with oxygen as a waste product. It is arguably the most important biochemical pathway known; nearly all life ... > more
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