If scientists had sacred objects, this would be one of them: a single, closely guarded 137-year-old cylinder of metal, housed in a vault outside of Paris. It is a prototype that precisely defines a ...

In this educational film, a father explains to his son Tommy the importance of weights and measures in everyday life. As they prepare to set up a train set, the father illustrates how measurements are ...

Both the companies and the Nuclear Regulatory Commission (NRC) are investigating some problems that resulted in loss of power at a couple of nuclear plants this past weekend. There was a problem with ...