If you use inverted camera controls, you might rotate shapes in your mind more slowly—but more accurately!—according to a recent neuroscience study

Specifically, there was a strong correlation between inversion preference and how quickly the subject could mentally rotate a ...
How-To Geek on MSN

How to Use the VSTACK and HSTACK Functions in Microsoft Excel

VSTACK and HSTACK are dynamic array functions, meaning the result spills from the cell in which you type the formula, and any changes to the data in the source arrays are reflected in the stacked ...