New Documentaries 2018 - Amazing Nature Places On Earth That Really Exist [BBC Documentary]

New Documentaries 2018 - Amazing Nature Places On Earth That Really Exist [BBC Documentary]

Travel back in nature in search of the answer to the universal question — who are we?
Experience the nature far beyond the man controls, the nature stages of evolution in our new documentary, ‘Nature.’ You’ll never see nature same again.

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There is no universally accepted definition of a mountain. Elevation, volume, relief, steepness, spacing and continuity have been used as criteria for defining a mountain.

In the Oxford English Dictionary a mountain is defined as "a natural elevation of the earth surface rising more or less abruptly from the surrounding level and attaining an altitude which, relatively to the adjacent elevation, is impressive or notable."

Whether a landform is called a mountain may depend on local usage. Mount Scott outside Lawton, Oklahoma is only 251 m (823 ft) from its base to its highest point.

Whittow's Dictionary of Physical Geography states "Some authorities regard eminences above 600 metres (2,000 ft) as mountains, those below being referred to as hills."

In the United Kingdom and the Republic of Ireland, a mountain is usually defined as any summit at least 2,000 feet (or 610 metres) high, whilst the official UK government's definition of a mountain, for the purposes of access, is a summit of 600 metres or higher.

In addition, some definitions also include a topographical prominence requirement, typically 100 or 500 feet (30 or 152 m). At one time the U.S. Board on Geographic Names defined a mountain as being 1,000 feet (300 m) or taller, but has abandoned the definition since the 1970s.

Any similar landform lower than this height was considered a hill. However, today, the United States Geological Survey (USGS) concludes that these terms do not have technical definitions in the US.

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