Illusory reddish dots appear to scintillate in white crosses.pic.twitter.com/1sgnthBykc
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
I know, but this one is an adaptation. The Bergen illusion has discrete edges.pic.twitter.com/VMQxMdB0cH
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.