Jupiter speaks…pic.twitter.com/jToiqpFpye
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
it should be. the reference is buried in my bookmarks, but it should be on arxiv. search around the timestamp date
Noted. 
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.