Part 4/15:
Physicist-turned-cryptocurrency theorist emphasizes that the choice of block time effectively sets the "center of hash"—the geographic and spatial center where most mining occurs. As miners dispersed across planets attempt to mine, latency and the speed of information travel create a 'hash horizon' beyond which the network's consensus begins to falter. This physical limitation, rooted in the finite speed of light, predicts that Bitcoin and similar proof-of-work systems will always be inherently constrained in their interplanetary reach.