Notes concerning “Self replication”

• Forming steel with copper instead of vice versa 02021-04-16 (updated 02021-06-12) (2 minutes)
• How fast do von Neumann probes need to reproduce to colonize space in our lifetimes? 02021-05-04 (updated 02021-06-12) (5 minutes)
• Cutting clay 02021-05-19 (updated 02021-12-30) (10 minutes)
• Firing talc 02021-07-14 (updated 02021-12-30) (17 minutes)