xkcd - A webcomic of romance, sarcasm, math, and language - By Randall Munroe http://tumblr.com/xvn5r9o2e
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
xkcd - A webcomic of romance, sarcasm, math, and language - By Randall Munroe http://tumblr.com/xvn5r9o2e