Everything I can't explain is aliens or maybe God.
It’s brilliant to see Molly Sole, the artist talk about how she created the ‘#Norwich fossilised keyboard’. I have recently read about her elsewhere, but it’s great to see her and photos from the time she made her work which intrigued and befuddled folks for a quarter of a century!
Originally I think I read about her in Norwich FB group post…but it looks like she’s updated her personal webpage since I last looked to include posts and photos relating to the keyboard - scroll to bottom:

I was hoping for a tale of tudor england revolving around religious artifacts and rebelious individuals and a hangover from the spanish inquisition.
But art students being art students can be just as interesting.😎
thought it was a tank tread mark
This is for @keyboards
@Natasha_Jay
There's always a simple answer....
You just have to know it