Yet reaching this point has required significant deepening of the Savannah River, from its natural depth of 17 feet (5.2 metres) to 42 feet today.

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In 2008, Switzerland-based Manas Petroleum (MNAP) announced it found an estimated 3 billion barrels of oil and 3 trillion cubic feet of natural gas at depth.

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Natural search is highly affected by the depth of content.

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At that depth there also is -- there are natural processes that deal with some amount of oil.

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"The methane 'leak' claim just got a lot more difficult for opponents" of natural gas, noted Steve Everley, with Energy In Depth, an industry-funded group.

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Conocimientos del pueblo Mayangna sobre la convivencia del hombre y la naturaleza: peces y tortugas, demonstrates the depth and breadth of local knowledge of the natural milieu, including behaviour, habitat, reproduction and migration patterns, and the introduction of new and invasive species.

UNESCO: Social and Human Sciences

The volume also serves to demonstrate to the scientific community the depth and breadth of local knowledge of the natural milieu and, as a result, the key role that the Mayangna must play in the sustainable use and management of the extensive territories from which they derive their livelihood, which include the Bosawas Biosphere Reserve.

UNESCO: Recognizing the value of indigenous knowledge for sustainable development | United Nations Educational, Scientific and Cultural Organization

Advancements made in the way consumers will interact with their computing devices were also demonstrated, including natural and more immersive interaction experiences using a 3-D depth camera.

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