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Polar Bear
The polar bear, also known as the white bear, northern bear, sea bear, or nanuq in some Inuit languages, is a species of bear that is native to the Arctic and the apex predator within its range. Its ... > more -
List of tornadoes and tornado outbreaks
These are some notable tornadoes, tornado outbreaks, and tornado outbreak sequences that have occurred around the ... > more -
Filling station
A filling station, gas station or petrol station is a facility which sells fuel and lubricants for road motor vehicles. The most common fuels sold are gasoline (petrol) or diesel fuel. Some stations ... > more -
Activated sludge
Activated sludge is a process in sewage treatment in which air or oxygen is forced into sewage liquor to develop a biological floc which reduces the organic content of the ... > more -
Geology of the Himalaya
The Geology of the Himalaya is a record of the most dramatic and visible creations of modern plate tectonic forces. The Himalayas, which stretch over 2400 km are the result of an ongoing orogeny, the ... > more -
1923 Great Kanto earthquake
The 1923 Great Kanto earthquake struck the Kanto plain on the Japanese main island of Honshu at 11:58 on the morning of September 1, 1923. The quake was later estimated to have had a magnitude ... > more -
Mantle plume
A mantle plume is an upwelling of abnormally hot rock within the Earth's mantle. As the heads of mantle plumes can partly melt when they reach shallow depths, they are thought to be the cause of ... > more -
Water turbine
A water turbine is a rotary engine that takes energy from moving water. Water turbines were developed in the nineteenth century and were widely used for industrial power prior to electrical grids. ... > more
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