because he is fat and lazy
The Invention of the Telegraph by Joseph Henry in 1831 led to the invention of the phone.
CD's
The hydrophone :)
The Walkman led to the invention of the iPod.
copernicus invented the telescope
The steam engine
A caveman.
The Wright brothers' invention of the airplane led to advancements in air transportation.
Exactly that...that one invention leads to another invention. For example. The invention of the car, led to the invention of the assembly line
The astronomical telescope.
The 'internet'