Well, I would say the gun, with the car or aeroplane a very close second.
The wheel and fire.
Monotheism
It gave us light so we can see
it changed the way we think on what to do
tesla
yes
it changed in 1798
the iphone
Aryabhatta who invented 0(Zero) changed the world of mathematics
The best invention in the world is definitely velcro
One invention in the 17th century that significantly altered the way people saw their world was the microscope. The other invention was the telescope.
computer, television, telephone , internet, light bulb, post, car, bicycle, paper, electricity, aeroplane.
Television and telephones