When you need a multimeter for testing electrical equipment around the home, it's vital to know what all those symbols around the dial mean.

How can we guess the size of an extinct animal when all that remains are a few scattered bones? A study conducted by ...

If you're planning to increase your electrical load by adding a new major appliance, make sure your panel can handle it. Here's how.

NPR's Ailsa Chang speaks to mathematician Eugenia Cheng about the Pascaline -- a 17th-century invention credited as the first mechanical calculator.