Neurosurgery is the surgical specialty that focuses on diseases and injuries involving the brain, spinal cord and peripheral nervous system.
Conjoined twins
"'Conjoined twins" are twins whose bodies are joined together at birth. This happens where the zygote of identical twins fails to completely separate. Conjoined twins occur in an estimated one in 200,000 births, and approximately half are stillborn. The overall survival rate for conjoined twins is between 5% and 25%. Conjoined twins are more likely to be female (70-75%). Daisy and Violet Hilton are a famous pair of conjoined twins. They were born in Brighton and were kept on top of the Evening Star pub, where they were taught to dance by a cruel barmaid. She then sold them and they toured Vaudeville. They became famous in the movie "Freaks" and lived long lives, eventually getting married.
Military of the United States
The military of the United States, officially known as the United States Armed Forces, is made of:
The President of the United States is the Commander-in-Chief of the Armed Forces.
All branches except the Coast Guard are part of the Department of Defense, which is controlled by the Secretary of Defense. The Coast Guard is part of the Department of Homeland Security. The Marine Corps is part of the Navy.
About 1.4 million people are currently on active duty in the military with another 1,259,000 people on reserve (with 456,000 people in the Army and Air National Guard). There is currently no conscription. Women can serve in most combat positions, and in all non-combat military jobs. Because of war, some of these non-combat jobs actually see combat regularly.
All the branches of the US military have both Officers and Enlisted. Most Enlisted people with a rank of E-4 and above are called Non-commissioned Officers (NCOs); the exception is the Air Force where E-5 is considered the first NCO rank. Their usual duties are to supervise or make sure that common jobs are done properly every day. Most branches also includes "Warrant Officers" ("Chief Warrant Officers" in the Navy.) They are considered experts in their field, they are higher rank than other enlisted troops, but below officers. There are four ranks of Warrant Officers: WO-1 through WO-4 (CWO-1 to CWO-4)
Here are some common ranks for the US Army, Air Force and Marines. These branches of the military use different names for the enlisted ranks, but they all use the same for officers. The Navy and the Coast Guard have different ranks; for those see United States Navy.
As noted above there are several different branches of the US Military. Each Branch has a different function [Land; Sea or Air]<br>
U.S. Army
Xiao
The xiao is a Chinese musical instrument. It is made from bamboo. It is an end-blown flute.
Mike D
Michael Diamond, better known as Mike D (born November 20, 1965), is an American rapper. He is a member of the Beastie Boys, a hip hop band.
Diamond co-founded the band "The Young Aborigines" in 1979. They changed the name of the band to the Beastie Boys in 1981. At that time, the band played hardcore punk music. In 1992, he founded his own record label, Grand Royal. He is married to Tamra Davis.
Defensive wall
A defensive wall is a fortification used to defend a city from potential aggressors. In ancient to modern times, they were used to enclose settlements. Generally, these are referred to as city walls or town walls, although there were also walls, such as the Great Wall of China, Hadrian's Wall, and the metaphorical Atlantic Wall, which extended far beyond the borders of a city and were used to enclose regions or mark territorial boundaries. Beyond their defensive value many walls also had important symbolic functions — representing the status and independence of the communities they embraced.
Autolycus of Pitane
Autolycus of Pitane (ca. 360 BC—d. ca. 290 BC) was a Greek astronomer, mathematician, and geographer. He was born in Pitane, a town of Aeolis, in Asia Minor. His works were probably completed in Athens between the years 335 BC and 300 BC. Autolycus' surviving works include a book on spheres (called "On the Moving Sphere") and another on the rising and setting of celestial bodies. "On the Moving Sphere" is believed to be the oldest mathematical treatise from ancient Greece that is completely preserved.
Euclid mentions Autolycus' work. Autolycus also taught Arcesilaus.
Maurolycus translated Autolycus' works in the sixteenth century.
Autolycus studied the movements of a sphere. It is believed they were the earliest written mathematics related books which have actually survived. Theodosius' "Sphaerics" was based on Autolycus' work on spheres.
Autolycus studied the relationship between the rising and the setting of the celestial bodies, and wrote that "any star which rises and sets always rises and sets at the same point in the horizon."
A crater on the Moon is named after him.
Hadrian's Wall
Hadrian's Wall ( or ) is a stone and turf fortification built across northern Great Britain by the Roman Empire in the early second century. The Roman emperor Hadrian built the wall to control barbarians: the ancient Britons to the north of the wall. The wall is now in England, and runs between the Solway Firth and the River Tyne in northern England. When the Romans built the wall, it was the northern border of the Roman Empire.
The Roman legions (armies) of the governor of Roman Britain, Platorius Nepos, built the wall for the emperor between 122 and 126. The wall was about long. Most of the wall – – was made of stone. To the west of this section – for – the wall was made of turf. The stone part of the wall was thick and about tall. The wall's turf part was thick and about tall. To start with, the wall's east end was at Newcastle upon Tyne (), but later the Romans built more stone wall for to the east, to Wallsend on Tyne. In front of the wall (on the northern side) was a ditch. The ditch was away from the wall. The ditch was at about deep and was normally about wide. The Romans used the wall for at least two hundred years.
Hadrian's Wall is part of the UNESCO World Heritage Site called Frontiers of the Roman Empire. It was made a UNESCO World Heritage Site in 1987. It shares this listing with the Antonine Wall in Scotland and the German fortifications known as the "Limes Germanicus". Hadrian's Wall was the first of two "great walls" created by the Romans in Great Britain. Its ruins are more visible than the lesser known Antonine Wall to the north.
The Vallum is a huge earthwork associated with Hadrian's Wall. It runs from coast to coast to the south of the wall.
Begun in AD 122, during the rule of the emperor Hadrian, it was the first of two fortifications built across Great Britain. The second was the Antonine Wall (now in Scotland), the lesser known of the two.
The original wall was 20 feet tall and 8 feet wide. It had a fort every 7 miles that housed a force of over 500 soldiers and for each mile there were smaller forts and watchtowers. There were three legions working on it and in 10 years it was nearly finished.
The wall was the most heavily fortified border in the Empire. In addition to its role as a military fortification, it is thought that many of the gates through the wall would have served as customs posts to allow trade and levy taxation.
A significant portion of the wall still exists, particularly the midsection, and for much of its length the wall can be followed on foot by Hadrian's Wall Path or by cycle on National Cycle Route 72.
"Stretching for 73 miles across northern England, Hadrian's Wall is the most important monument of Roman Britain, and the best-known frontier of the entire Roman empire".English Heritage describes it as "one of the towering achievements of military engineering, and a monument to the power of one of the greatest empires in world history".
Brigantes