Twitter's "Trending Topics" is a popular feature that allows you to see what are the most popular subjects being discussed on Twitter in real time. Yesterday, amid popular tweets about Wimbledon, Steve McNair, and Harry Potter, one thing seemed to be on everybody's mind: gorilla penis. (Click on the screen cap below to enlarge the image.) Highlighting another crack in Twitter security, hackers flooded onto Twitter yesterday to create fake accounts and drive global discussions toward primate anatomy.

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