blaise pascal invented the first mechanical adding machine
I would say that the single most influential achievement was made by Johannes Gutenberg when he invented the printing press in 1450. That enabled scientific discoveries to reach more people and promote more scientific achievements.
Scientific achievement such as figuring out the Earth's stupid circumference...
was blaise poor
He was French.
he was an inventor
i have know idea
Blaise Pascal invented the first calculator and Pascals triangle.
Blaise Pascal's father was a Tax Collector in Rouen, France.