Why were americans so driven to expand across the continent? Was it simple greed, or did they have a reason? provide evidence.

answer; ///i believe the correct answer is john marshall;

there were abundant sources of fuel nearby

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on