The asterisk (*) is the wildcard character that represents any sequence of characters, including when there are no characters at all. It’s the most flexible of the bunch, since it can replace any ...

For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

The @ symbol can also appear in regular formulas outside of tables when Excel thinks you're trying to reference a single value from a range. If you see it pop up unexpectedly, it usually means Excel ...

Lost your iPhone and wondering what to do next? Stay alert, those “found” texts could be scams! Here's how to avoid falling for false hope.