[polishdude20]

Can they just be doodles? Sometimes I just draw crosshatch lines and stuff especially when I was in college.

[ethanbond]

Potentially but like… that’s very very hard rock, so those would be some very effortful doodles.

Maybe they had more boring classes than we do today though ¯\_(ツ)_/¯

[stOneskull]

maybe they're tripping

[zikduruqe]

Stoned Apes?

https://en.wikipedia.org/wiki/Stoned_ape_theory