There's a bump on the nub on the foram on the shell on the stage in the middle of my scope.
I think some of those bumps are in fact bits of broken diatom. Be sure to zoom into that last one.
@hackerfriendly How about investigating the surface smoothness of a common cheap fork? IKEA or similar?
Or perhaps the nozzle of an inkjet printer.
Cybrespace is an instance of Mastodon, a social network based on open web protocols and free, open-source software. It is decentralized like e-mail.