nostr:npub1jhg4shj0flkcu37r83dmtzma8qyhjnvf3vvfhy9kq76qc33annqs5lt9mt nostr:npub1z0t580awe5ef8sk2qp5ps8w87kgpmjswsc8xf7dkfrtuu2dn5ygqa9wj4p nostr:npub1eeetax7xxyr7mem486lqayj4av7czytttp9swjwn6yry6sn790lqrve209 Newton rings! I was trying to explain this to nostr:npub13yhtced946jss464sh05p0lfp9xaa0ypfeh89fy69ceksdwxfx9sdha5se recently. They have a massive, like 15-foot long Scitext scanner at the Museum of Printing in Haverhill, MA, which is covered with dials, like a mad scientist created it.