how did people come up with such advanced technology?
one step at a time. the first step usually takes a long long long long long long long long long time to come up with. i don't even know how that happens. maybe after enough time, lightning strikes, or something. who knows how it happens...... because most of the time it doesn't happen. But, once you get that first step, then the other steps happen much more quickly, because each step enhances the ability to make future steps