We always liked the lofty design of euro notes. Until Planet Money reader Peter Minnig wrote in to point out the secret messages hidden in the notes — clues that suggest all may not end well for the euro.
What follows are a combination of clues Minnig pointed out, and those we found ourselves.
(Sorry about that giant "Specimen" printed across the bills. We're just following the European Central Bank's anti-counterfeiting rules.)