steam engine time
A period of time when many inventors all over the world, despite isolation from each other, and with no contact with each other in any way, begin inventing a similar technology with a coincidental commonality of ideas.
The invention of the steam engine didn't occur in only one place but was invented independently and in isolation by many inventors all over the world.
Another example of steam engine time includes the independent invention of the aeroplane by people in isolation from each other in many different regions of the world, leading to arguments about "who" invented the aeroplane first.
Another example of steam engine time includes the independent invention of the aeroplane by people in isolation from each other in many different regions of the world, leading to arguments about "who" invented the aeroplane first.