ViHart's latest video reminds us once again of the value of idle hands. In it, she demonstrates how easily our humble appendages can make us look like fiddly geniuses – or at least like common math ...

PITTSBURGH (KDKA) -- Unless you're an architect or an engineer, it's probably been years since you last used a protractor in geometry class. But, now the semi-circular tool is showing up in some odd ...