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Wolf pits are deep pits, dug into soft soils, normally near farmland. The pit itself would have been covered by branches and baited with carrion such as a dead cow. The wolf would be attracted by the smell, fall in the pit and be unable to scale the steep sides; it could then be killed. [3]
Dugout home near Pie Town, New Mexico, 1940 Coober Pedy dugout, Australia. A dugout or dug-out, also known as a pit-house or earth lodge, is a shelter for humans or domesticated animals and livestock based on a hole or depression dug into the ground.
However, ERD wells are more shallow than the Kola Borehole, owing to a large horizontal displacement. In July 2023, China began drilling deep boreholes, one at the Sichuan Basin expected to reach 10,520 metres (34,510 ft) into the ground and the other at the Tarim Basin with a planned depth of 11,100 metres (36,400 ft). [12] [13]
Aralsor SG-1 (in the Pre-Caspian Basin of west Kazakhstan) and Biyikzhal SG-2 (in Krasnodar Krai), both less than 6,810 metres (22,340 ft) deep, preceded Kola SG-3, which was originally intended to reach 7,000 metres (23,000 ft) deep. [2] Drilling at Kola SG-3 began in 1970 using the Uralmash-4E, and later the Uralmash-15000 series drilling rig.
Construction equipment being used to dig up rocky ground. Although humans are capable of digging in sand and soil using their bare hands, digging is often more easily accomplished with tools. The most basic tool for digging is the shovel. [1] In neolithic times and earlier, a large animal's scapula (shoulder blade) was often used as a crude ...
A gas main being laid in a trench. A trench is a type of excavation or depression in the ground that is generally deeper than it is wide (as opposed to a swale or a bar ditch), and narrow compared with its length (as opposed to a simple hole or pit).
A burrow is a hole or tunnel excavated into the ground by an animal to construct a space suitable for habitation or temporary refuge, or as a byproduct of locomotion. Burrows provide a form of shelter against predation and exposure to the elements, and can be found in nearly every biome and among various biological interactions. Many animal ...
The most famous example of subterranean fiction is Jules Verne's 1864 science-fiction novel Journey to the Center of the Earth, which has been adapted many times as a feature film and for television. The novel is not an example of Hollow Earth, as his characters actually descend only 87 miles beneath the surface, where they find an underground ...