Happy Anniversary Rule 30

(Image: By Richard Ling - Own work; Location: Cod Hole, Great Barrier Reef, Australia, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=293495)

This year my wife and I are celebrating our 40th anniversary. This year Stephen Wolfram also celebrates the 40th anniversary of his favorite scientific discovery as he wrote in My All-Time Favorite Science Discovery

Also, see a prior post -https://www.blogger.com/blog/post/edit/8711601538345502519/636715033944644578.

This discovery led to Wolfram's publication of A New Kind of Science (now available online).