The "International Year of the Periodic Table" is well under way, and it feels like something new is posted daily. It's great fun!
This "visual history" by Science magazine does a good job of visualising the many shapes the table has taken so far. http://vis.sciencemag.org/periodic-table/
(The animations didn't work properly in Firefox ESR, but Chromium seems to handle them fine). #IYPT2019