What's up means how are you or how you doing?​

it kinda means what are you up to/how you doing

meaning:how are you doing

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

information is crucial for making good decisions