Monday, 1 September 2014
The History of Email
Monday, 31 March 2014
60 hours in a air-bubble underwater
Fire fighting robot
Arthrobotrys fungus
Green Parakeet
Frankenstein's author's strange fact
Tuesday, 25 March 2014
Larry Da Leopard
Environment friendly cemetery
The Flying Snake
Chrysopelea, or more commonly known as the flying snake, is a genus that belongs to the family Colubridae. Flying snakes are mildly venomous,[1] though they are considered harmless because their toxicity is not dangerous to humans.[2] Their range is in Southeast Asia (the mainland, Greater and Lesser Sundas, Maluku, and the Philippines), southernmost China, India, and Sri Lanka.
It can jump from tree to tree and glide in the air for over 300 feet.
Tuesday, 18 March 2014
Ndebele people - Long necks
World's largest Rodent pet
Music making you immortal
Restaurant run by dreaded criminals
Alligators skyfall
Ivory black paint
Ancient "Babylonian" business transactions
Fingerprints were used in Ancient Babylon to seal documents or in signing official papers. Fingerprints could also be placed on clay tablets used for business transactions. This was a sure way of ensuring that documents would not be duplicated.
History of Fingerprinting
There are records of fingerprints being taken many centuries ago, although they weren't nearly as sophisticated as they are today. The ancient Babylonians pressed the tips of their fingertips into clay to record business transactions. The Chinese used ink-on-paper finger impressions for business and to help identify their children.
However, fingerprints weren't used as a method for identifying criminals until the 19th century. In 1858, an Englishman named Sir William Herschel was working as the Chief Magistrate of the Hooghly district in Jungipoor, India. In order to reduce fraud, he had the residents record their fingerprints when signing business documents.
A few years later, Scottish doctor Henry Faulds was working in Japan when he discovered fingerprints left by artists on ancient pieces of clay. This finding inspired him to begin investigating fingerprints. In 1880, Faulds wrote to his cousin, the famed naturalist Charles Darwin, and asked for help with developing a fingerprint classification system. Darwin declined, but forwarded the letter to his cousin, Sir Francis Galton.
Galton was a eugenicist who collected measurements on people around the world to determine how traits were inherited from one generation to the next. He began collecting fingerprints and eventually gathered some 8,000 different samples to analyze. In 1892, he published a book called "Fingerprints," in which he outlined a fingerprint classification system -- the first in existence. The system was based on patterns of arches, loops and whorls.
Meanwhile, a French law enforcement official named Alphonse Bertillon was developing his own system for identifying criminals. Bertillonage (or anthropometry) was a method of measuring heads, feet and other distinguishing body parts. These "spoken portraits" enabled police in different locations to apprehend suspects based on specific physical characteristics. The British Indian police adopted this system in the 1890s.
Around the same time, Juan Vucetich, a police officer in Buenos Aires, Argentina, was developing his own variation of a fingerprinting system. In 1892, Vucetich was called in to assist with the investigation of two boys murdered in Necochea, a village near Buenos Aires. Suspicion had fallen initially on a man named Velasquez, a love interest of the boys' mother, Francisca Rojas. But when Vucetich compared fingerprints found at the murder scene to those of both Velasquez and Rojas, they matched Rojas' exactly. She confessed to the crime. This was the first time fingerprints had been used in a criminal investigation. Vucetich called his system comparative dactyloscopy. It's still used in many Spanish-speaking countries.
Sir Edward Henry, commissioner of the Metropolitan Police of London, soon became interested in using fingerprints to nab criminals. In 1896, he added to Galton's technique, creating his own classification system based on the direction, flow, pattern and other characteristics of the friction ridges in fingerprints. Examiners would turn these characteristics into equations and classifications that could distinguish one person's print from another's. The Henry Classification System replaced the Bertillonage system as the primary method of fingerprint classification throughout most of the world.
In 1901, Scotland Yard established its first Fingerprint Bureau. The following year, fingerprints were presented as evidence for the first time in English courts. In 1903, the New York state prisons adopted the use of fingerprints, followed later by the FBI.
Baskin Shark
The basking shark is the second-largest living fish, after the whale shark, and one of three plankton-eating sharks besides the whale shark and mega mouth shark. It is a cosmopolitan migratory species, found in all the world's temperate oceans.
Scientific name: Cetorhinus maximus
SizeLength: 6.7 - 8.8 m
Weight : 6 tonnes
Very little information is known about the natural ecology and behaviour of the basking shark. It receives its common name from its feeding behaviour, when individuals appear to be ‘basking’ on the water’s surface, swimming very slowly with their entire dorsal fin out of the water (2). These sharks feed passively (unlike the also plankton-feeding whale shark and megamouth shark (Megachasma pelagios) which can use its head muscles to suck water into the mouth), merely by swimming through the water with their mouths gaping (2). As water passes over the gills, plankton are retained; a fairly large shark can filter roughly 1,500 cubic metres of water an hour (6). These giant fish have occasionally been observed leaping out of the water (2), which is probably related to social behaviour (12).
Basking sharks are usually solitary, although pairs and groups of up to 100 individuals have been seen (2). This species mysteriously disappears from coastal waters in the winter months and it was recently suggested that they ‘hibernate’ in the deep water. It is also thought that during this time of low food availability basking sharks shed and then replace the gill rakers (11). This suggestion has been refuted by scientific satellite tracking of sharks, revealing extensive migrations throughout all seasons (13). The only pregnant female ever caught gave birth to six live young; the prevailing view is that that these sharks are ovoviviparous (8), and it is likely that they only give birth every two to four years.
A Baskin shark's liver accounts for one quarter of its body weight.
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