Les Perelman, a researcher at the Massachusetts Institute of Technology, has been doing some interesting experiments to test the capacity of computerized grading systems to accurately judge the ...

Coin grading is the process by which a certified numismatist determines the grade, or physical condition, of an existing coin. Once the grade is determined, the value of the coin can then be ...

Though some coins are more valuable than others, graded coins tend to fetch the most when it comes time for resale. But what is a graded coin? Who does the grading and how can you have coins in your ...