The one you're not looking at turns clockwise. I believe this illusion was invented by Arthur Shapiro and collaborators: http://www.illusionsciences.com/2008/12/rotating-reversals.html …pic.twitter.com/LXXspHOn2m
-
-
Replying to @johncarlosbaez
I guess
@AkiyoshiKitaoka knows who invented this for sure.1 reply 0 retweets 2 likes
Replying to @panlepan @johncarlosbaez
I guess Arthur did, as mentioned.
5:29 PM - 13 Oct 2018
0 replies
0 retweets
4 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.