Read somewhere but tried searching for it on Google brought up nothing. I know the first car was around 1885, and the first manmade satellite was (Sputnik 1) was on 1957 & on 1961 with Vostok 1. Is the "in ~100" years correct then?
Thanks!
Generally right if you start from the automobile.
However it does fail if you start at the creation of the railways (Stockton and Darlington Railway opened in 1825).