Person responsible for explaining the circulatory system was William Harvey. He was a famous physician and his work was based on observing the effect of pumping blood to the brain and body.
They have expanded the right to vote to more and more people.
Recall election
A recall election occurs on the state or local level when a group of citizens is upset with the job the official is doing. Citizens need a signed petition for a recall vote and when the recall is approved, a challenger and the elected official will go through an election process. If the elected official wins the election then they are allowed to continue in their position until their term is up. If they lose the recall, then they are replaced by the winner.
Some sort of feeling would affect ones sensation