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Tunga penetrans. (Linnaeus, 1758) Tunga penetrans is a species of flea also known as the jigger, jigger flea, chigoe, chigo, chigoe flea, chigo flea, nigua, sand flea, or burrowing flea. It is a parasitic insect found in most tropical and sub-tropical climates. In its parasitic phase it has significant impact on its hosts, which include humans ...
Kola Superdeep Borehole, commemorated on a 1987 USSR stamp. Drilling at Kola SG-3 began on 24 May 1970 using the Uralmash -4E, a serial drilling rig used for drilling oil wells. The rig was slightly modified to be able to reach a 7,000-metre (23,000 ft) depth. In 1974, the new purpose-built Uralmash-15000 drilling rig was installed onsite ...
Hobby tunneling is tunnel construction as a pastime. [1][2] Usually, hobby tunnelers dig their tunnels by hand, using little equipment, and some can spend years or even decades to achieve any degree of completion. [2] In some cases tunnels have been dug secretly, and only discovered by chance.
Tungiasis. Tungiasis is an inflammatory skin disease caused by infection with the female ectoparasitic Tunga penetrans, a flea also known as the chigoe, chigo, chigoe flea, chigo flea, jigger, nigua, sand flea, or burrowing flea (and not to be confused with the chigger, a different arthropod). The flea and the disease that it causes are found ...
Fracking (also known as hydraulic fracturing, fracing, hydrofracturing, or hydrofracking) is a well stimulation technique involving the fracturing of formations in bedrock by a pressurized liquid. The process involves the high-pressure injection of "fracking fluid" (primarily water, containing sand or other proppants suspended with the aid of ...
The 1962 "Sedan" plowshares shot displaced 12 million tons of earth and created a crater 320 feet (98 m) deep and 1,280 feet (390 m) wide. Project Plowshare was the overall United States program for the development of techniques to use nuclear explosives for peaceful construction purposes. The program was organized in June 1957 as part of the ...
Digging bar. A digging bar is a long, straight metal bar used for various purposes, including as a post hole digger, to break up or loosen hard or compacted materials such as soil, rock, concrete and ice or as a lever to move objects. Known by other names depending on locale, structural features and intended purpose such as a hop bar or crowbar ...
The Komsomolskoye massacre occurred following the Battle of Komsomolskoye (Chechen: Saadi-Kotar) during the Second Chechen War in March 2000. A prominent feature in the incident was the fate of a group of about 72 Chechen combatants who had surrendered on 20 March on a Russian public promise of amnesty, but had almost all either died or "disappeared" shortly after they were detained.