When you need a quick measurement and have no ruler around, the common objects you have in your wallet can give you an approximation. Here are the dimensions for US paper money, coins, credit cards, ...

Size Matters: Measuring distances between molecules is no simple task, but a team of German researchers has developed a new method that could revolutionize biological research and possibly even impact ...

Nobody carries a ruler with them everywhere, but you can measure short distances accurately if you memorize the lengths of your feet and hand span. Quora user Peter Baskerville suggests measuring your ...

This release is also available in Chinese on EurekAlert! Chinese. College Park, MD (August 31, 2010) -- With the advent of nanometer-sized machines, there is considerable demand for stable, precise ...