Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Today, people tend to ...

An 1853 print by Japanese artist Toyokuni Utagawa shows a ninja sneaking up behind a musician.<br>Ninja are everywhere in popular culture — they slice up mobsters ...

Today, December 5th, is the annual Day of the Ninja, according to Google (and ninjas everywhere). While I’m personally familiar with the concepts of both ninjas and pirates, I must admit that I’ve not ...