npub1psdfxfpxz2cwmmnsk60y3nqpn2tqh9n24h4hstvfkwvr6eaek9js499sr7 (npub1psd…9sr7)
It's kind of a fun idea: what can we send back to Campbell in 1955 to show him what the future is like? (I have a nice cheapish solar scientific calculator. No batteries. One of those...)