I'm Galileo Galilei the person who created the thermometer.
While many more inventors tried to do it I was the first one.
It was a container filled with bulbs of varying mass, each with a temperature marking, the buoyancy of water changes with temperature, some of the bulbs sink while others float, the lowest bulb indicated what temperature it was.
In 1593, I invented a rudimentary water thermoscope, which for the first time, allowed temperature variations to be measured.
This will change are life, it is the first temperature variations to be measured. It can saves a life.
This changed are world because we could see how hot we are or see if we should go to a doctor. Everyoe has them just in case. This changed the world in a great way.