# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2019-05-08 16:19:47 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/1126159773886496769) In reply to: [@keefmoon](http://twitter.com/keefmoon/status/1126159508819017728) Have they constantly been testing and experimenting with the Tesserate for 70 years?