|
Dry Quicksand
Dry quicksand is loose sand whose bulk density is reduced by blowing air through it and which yields easily to weight or pressure. It acts similarly to normal quicksand, but it does not contain any water and does not operate on the same principle. Dry quicksand is an example of a granular material. Historically, the existence of dry quicksand was doubted, and the reports of humans and complete caravans being lost in dry quicksand were considered to be folklore. In 2004, it was created in the laboratory, but it is still not clear what its actual prevalence in nature is. Scientific research Writing in ''Nature'', physicist Detlef Lohse and coworkers of University of Twente in Enschede, Netherlands allowed air to flow through very fine sand (typical grain diameter was about 40 micrometers) in a container with a perforated base. They then turned the air stream off before the start of the experiment and allowed the sand to settle: the packing fraction of this sand was only 41% (compa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sand
Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class of soil or soil type; i.e., a soil containing more than 85 percent sand-sized particles by mass. The composition of sand varies, depending on the local rock sources and conditions, but the most common constituent of sand in inland continental settings and non-tropical coastal settings is silica (silicon dioxide, or SiO2), usually in the form of quartz. Calcium carbonate is the second most common type of sand, for example, aragonite, which has mostly been created, over the past 500million years, by various forms of life, like coral and shellfish. For example, it is the primary form of sand apparent in areas where reefs have dominated the ecosystem for millions of years like the Caribbean. Somewhat more rarely, sand may be composed of calciu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humans
Humans (''Homo sapiens'') are the most abundant and widespread species of primate, characterized by bipedalism and exceptional cognitive skills due to a large and complex brain. This has enabled the development of advanced tools, culture, and language. Humans are highly social and tend to live in complex social structures composed of many cooperating and competing groups, from families and kinship networks to political states. Social interactions between humans have established a wide variety of values, social norms, and rituals, which bolster human society. Its intelligence and its desire to understand and influence the environment and to explain and manipulate phenomena have motivated humanity's development of science, philosophy, mythology, religion, and other fields of study. Although some scientists equate the term ''humans'' with all members of the genus ''Homo'', in common usage, it generally refers to ''Homo sapiens'', the only extant member. Anatomically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluidization
Fluidization (or fluidisation) is a process similar to liquefaction whereby a granular material is converted from a static solid-like state to a dynamic fluid-like state. This process occurs when a fluid (liquid or gas) is passed up through the granular material. When a gas flow is introduced through the bottom of a bed of solid particles, it will move upwards through the bed via the empty spaces between the particles. At low gas velocities, aerodynamic drag on each particle is also low, and thus the bed remains in a fixed state. Increasing the velocity, the aerodynamic drag forces will begin to counteract the gravitational forces, causing the bed to expand in volume as the particles move away from each other. Further increasing the velocity, it will reach a critical value at which the upward drag forces will exactly equal the downward gravitational forces, causing the particles to become suspended within the fluid. At this critical value, the bed is said to be fluidized and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fech Fech
Fech fech ( ar, فش فش) is a very fine powder caused by the erosion of clay-limestone terrain and it is most commonly found in deserts. It consists of a surface horizon of pulverized soil with low particle cohesion protected under a thin crust. Fech fech is derived from ancient lake muds or on certain argillaceous rocks and is one of the desert surfaces that produces dust. It is not determinable from the surface and can therefore pose a significant transportation hazard acting as a surprise "trap" as the ground collapses beneath a vehicle miring it in a quicksand-like substance. Fech-fech is classified into two types: * Fech-fech that developed during the Holocene, in lake mud or fluvio-lacustrine sediments. * Fech-fech that developed from shale. Fech fech is common in the Qattara Depression, making that portion of the Sahara Desert impassable by most vehicles. See also * Dry quicksand Dry quicksand is loose sand whose bulk density is reduced by blowing air through it and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Mummy (1999 Film)
''The Mummy'' is a 1999 American action-adventure film written and directed by Stephen Sommers. It is a remake of the 1932 film of the same name, starring Brendan Fraser, Rachel Weisz, John Hannah and Arnold Vosloo in the title role as the reanimated mummy. The film follows adventurer Rick O'Connell as he travels to Hamunaptra, the City of the Dead, with a librarian and her older brother, where they accidentally awaken Imhotep, a cursed high priest with supernatural powers. Development of the film took years, with multiple screenplays and directors attached. In 1997, Stephen Sommers successfully pitched his version of a more adventurous and romantic take on the source material. Principal photography took place in Morocco and the United Kingdom; the crew endured dehydration, sandstorms, and snakes shooting on location in the Sahara desert. Industrial Light & Magic provided many of the visual effects, blending live-action footage and computer-generated imagery to create the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hotel Del Luna
''Hotel del Luna'' () is a 2019 South Korean television series, starring Lee Ji-eun and Yeo Jin-goo as the owner and manager, respectively, of the eponymous hotel that caters only to ghosts. Produced by GT:st, written by the Hong sisters and directed by Oh Choong-hwan, it aired on tvN from July 13 to September 1, 2019. It was the most viewed tvN drama of 2019 and is one of the highest-rated Korean dramas in cable television history. Synopsis "Hotel del Luna" (previously known as "Guest House of the Moon") is not like any other hotel. A supernatural place, the hotel is not visible in its true form during the daytime and humans can only come across the hotel under special circumstances. Its staff and clients are all ghosts coming to terms with unfinished business in their former lives before they pass on to the afterlife and cycle of reincarnation; the staff, in particular, have been there for decades or centuries as they have not settled their grudges. The exception to this i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Princess Bride (film)
''The Princess Bride'' is a 1987 American fantasy adventure comedy film directed and co-produced by Rob Reiner and starring Cary Elwes, Robin Wright, Mandy Patinkin, Chris Sarandon, Wallace Shawn, André the Giant, and Christopher Guest. Adapted by William Goldman from his 1973 novel of the same name, it tells the story of a swashbuckling farmhand named Westley, accompanied by companions befriended along the way, who must rescue his true love Princess Buttercup from the odious Prince Humperdinck. The film preserves the novel's metafictional narrative style by presenting the story as a book being read by a grandfather to his sick grandson. The film was first released in the United States on September 25, 1987, and was well received by critics at the time. After only having modest success at the box office at first, it has over time become a cult film and been considered as one of the best films of the 1980s, and one of Reiner's best works. The film is number 50 on the Bravo's "10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lawrence Of Arabia (film)
''Lawrence of Arabia'' is a 1962 British epic historical drama film based on the life of T. E. Lawrence and his 1926 book ''Seven Pillars of Wisdom''. It was directed by David Lean and produced by Sam Spiegel, through his British company Horizon Pictures and distributed by Columbia Pictures. The film stars Peter O'Toole as Lawrence with Alec Guinness playing Prince Faisal. The film also stars Jack Hawkins, Anthony Quinn, Omar Sharif, Anthony Quayle, Claude Rains and Arthur Kennedy. The screenplay was written by Robert Bolt and Michael Wilson. The film depicts Lawrence's experiences in the Ottoman provinces of Hejaz and Greater Syria during the First World War, in particular his attacks on Aqaba and Damascus and his involvement in the Arab National Council. Its themes include Lawrence's emotional struggles with the violence inherent in war, his identity and his divided allegiance between his native Britain with its army and his new-found comrades within the Arabian deser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miss Fisher And The Crypt Of Tears
''Miss Fisher and the Crypt of Tears'' is a 2020 Australian mystery adventure film directed by Tony Tilse and starring Essie Davis as Phryne Fisher. It is based on the ''Miss Fisher's Murder Mysteries'' television series and the series of Phryne Fisher novels written by Kerry Greenwood. Plot Phryne Fisher helps to rescue a young Bedouin girl called Shirin from imprisonment in 1920s Jerusalem. While doing so she is suspected of having died. Shirin is reunited with her uncle Sheikh Kahlil Abbas and they travel to Lofthouse Manor in England where a memorial is being held for Miss Fisher by her friends Lord and Lady Lofthouse. DI Jack Robinson travels to England from Australia to attend the memorial and is just about to deliver her eulogy when Miss Fisher arrives in her biplane. Shirin discusses with Miss Fisher about how she came to be in Jerusalem. As a child, a sandstorm had wiped out her village and she was the only survivor having been rescued by a mysterious stranger. This s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indiana Jones And The Kingdom Of The Crystal Skull
''Indiana Jones and the Kingdom of the Crystal Skull'' is a 2008 American action-adventure film directed by Steven Spielberg and the fourth installment in the ''Indiana Jones'' series. Released and taking place 19 years after the previous film, it is set in 1957, pitting Indiana Jones (Harrison Ford) against Soviet KGB agents led by Irina Spalko (Cate Blanchett)—searching for a telepathic crystal skull. Jones is aided by his former lover, Marion Ravenwood ( Karen Allen), and their son, Mutt Williams ( Shia LaBeouf). Ray Winstone, John Hurt, and Jim Broadbent are also part of the supporting cast. Screenwriters Jeb Stuart, Jeffrey Boam, Frank Darabont, George Lucas and Jeff Nathanson wrote drafts before David Koepp's script satisfied the producers. The filmmakers intended to pay tribute to the science fiction B-movies of the 1950s era. Shooting began on June 18, 2007, at various locations in New Mexico, New Haven, Connecticut, Hawaii, and Fresno, California, as w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronaut
An astronaut (from the Ancient Greek (), meaning 'star', and (), meaning 'sailor') is a person trained, equipped, and deployed by a human spaceflight program to serve as a commander or crew member aboard a spacecraft. Although generally reserved for professional space travelers, the term is sometimes applied to anyone who travels into space, including scientists, politicians, journalists, and tourists. "Astronaut" technically applies to all human space travelers regardless of nationality. However, astronauts fielded by Russia or the Soviet Union are typically known instead as cosmonauts (from the Russian "kosmos" (космос), meaning "space", also borrowed from Greek). Comparatively recent developments in crewed spaceflight made by China have led to the rise of the term taikonaut (from the Mandarin "tàikōng" (), meaning "space"), although its use is somewhat informal and its origin is unclear. In China, the People's Liberation Army Astronaut Corps astronauts and their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apollo Lunar Module
The Apollo Lunar Module (LM ), originally designated the Lunar Excursion Module (LEM), was the lunar lander spacecraft that was flown between lunar orbit and the Moon's surface during the United States' Apollo program. It was the first crewed spacecraft to operate exclusively in the airless vacuum of space, and remains the only crewed vehicle to land anywhere beyond Earth. Structurally and aerodynamically incapable of flight through Earth's atmosphere, the two-stage lunar module was ferried to lunar orbit attached to the Apollo command and service module (CSM), about twice its mass. Its crew of two flew the complete lunar module from lunar orbit to the Moon's surface. During takeoff, the spent descent stage was used as a launch pad for the ascent stage which then flew back to the command module, after which it was also discarded. Overseen by Grumman, the LM's development was plagued with problems that delayed its first uncrewed flight by about ten months and its first crewed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Astronaut")
