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

The Discovery Center Museum in Rockford is teaching visitors how to make a sundial, an ancient tool used to tell time using the sun.

Which is best for your business, a Facebook Page or personal profile? Learn the differences and how to start and optimize your Page. When we think of local search, we tend to think of Google. Yet ...