Indeed! That spoiler was a vague tease. Huh! You think? Dude, I have no idea what the puzzle points to. I don’t know what those posters signify. I was just mucking around. Your puzzle is intact. I will catch up with the answer and explanation of clues next week. No time to solve. Busy weekend. Gotta go. Ciao!
In that case you did use a strong clue word unintentionally! Apart from that bit about Professor Hawking.
I don’t know which precise event you are referring to in the context of the puzzle in that grid. I do have a vague idea about what you are talking hence the strong word. But still, I haven’t figured out the exact solution like I know it’s a ‘cat massacre’ from Pangur clue but I don’t know which ‘printing press’. Nevertheless, the integrity of your puzzle building hasn’t been breached yet because I, with my marginal spoiler, haven’t cracked the answer yet, in case others have. If you can keep it open till next week, then I shall take a stab at it again.
Hehe! Catty analogy to tell you that I am everywhere but nowhere yet. Dude, There are entwined clues confusing me here. Can you point to the key tile in the grid if that does not compromise the puzzle.