from Hacker News

The Euro: Denominations

by Loeffelmann on 9/22/22, 11:32 AM with 1 comments

• by arethuza on 9/22/22, 11:38 AM

  One thing that is neat about Euro banknotes is that they include the element Europium as part of the security features:

  https://en.wikipedia.org/wiki/Europium#Applications