Literally not magic, but millions of patents and innovations that we understand down to the quantum level.
That's why the Romans could never make huge advances, they didn't understand the fundamentals. They knew using coal to make swords gave them better, harder edges, but they found it by raw accident, not knowing that the iron and carbon were combining atomically.
That's why the Romans could never make huge advances, they didn't understand the fundamentals. They knew using coal to make swords gave them better, harder edges, but they found it by raw accident, not knowing that the iron and carbon were combining atomically.