The Virginia-class attack submarines are allocated to replace the ageing Los Angeles class of submarines which have housed a substantial portion of America's mobile, nuclear arsenal They are designed for extremely long-mission durations with minimal time spent in port for replenishment and 15-year maintenance cycles in dry dock

Scientists researching and studying the solar system have come up with a highly unusual explanation for the erratic behavior of two of the coldest, most far flung planets circling the sun – Neptune and Uranus Both planets are several times the size of the Earth and because they are so far from the sun, they are extremely cold and inhospitable but, the extremes of pressure and temperature have led the scientists to a remarkable conclusion – these planets have oceans made of liquid diamond and probably have diamond icebergs floating across them too

American history is a deeply woven story of new discoveries, seemingly endless frontiers and dogged perseverance Stories of events and movements that shaped our world and helped build our country can be heard from coast to coast and everywhere in between: the Industrial Revolution that sprouted in the northeast and moved outward, tales of revolution and martyrdom in the South

Silver is used in many things and for many reasons Pure silver is extremely soft and when mixed with other alloys it is used in jewelry

Gold has held a fascination for people throughout time and will always be seen as a precious gold that is coveted by everyone Below are some interesting facts pertaining to gold and the many ways people use it to express themselves

In 2006, Leonardo DiCaprio hit the movie screens with Blood Diamonds detailing the story of a diamond smuggler cum mercenary and that of a man who had lost his family to rebels who kidnapped his son for work in a conflict diamond mine Blood diamonds are not named for their color but rather the very real blood which is shed in order to mine them and more sinister, the arms for civil war for which they are used to pay for

CNC Routing (Computer Numerical Control) is where a computer-controlled, routing mill is used for intricate or large volume production runs where a high standard of replicated product is required CNC routing may be used for metal milling but it is more commonly used for woodworking and cabinetry manufacture though other materials such as plastics and nonferrous metals can be worked on also

Gold needs no introduction – it is one of the most sought-after, precious metals on the planet and widely used in jewelry and adornments as well as in industry; you can even drink the stuff at your local bar in over-priced shots such as Goldschlagger, but there are some uses for gold you may not suspect and, may even be more than a little surprised at

A hologram is created by capturing the light reflected from an object and reconstructing it so the subject appears to move relative to the position of the viewer of the hologram This is what makes a hologram appear 3-dimensional but in fact it is not, it is a 2-dimensional representation just as an ordinary photograph