a demo of the four-stroke apparent motion (2 phi shifts and 2 reversed-phi shifts) (Mather) http://www.psy.ritsumei.ac.jp/~akitaoka/reversephi-rings2020B2-fourstrokemotion01-70ms.gif …pic.twitter.com/wrqMY22JS0
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