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3500 BCE
The wheel
A circular block made out of a hard material. It was created by the ancient greeks, in Mesopotamia, around 3500 B.C. They invented the wheelbarrow. A cart with a single wheel -
1440
Printing press
A mechanical device for applying pressure to a surface that has ink. It was one of the most influential events in the second millennium. It was created by Johannes Gutenberg. -
Clock
It was created by Christiaan Huygens. After clocks were invented, they were many ways of telling time. It is important because it helps us manage our lives. -
Vaccines
A vaccine is a way to avoid diseases.It was created by Eduard Jenner. Vaccines help the body’s immune system to recognize and fight viruses or bacterias, and it keeps us safe from the diseases they cause. -
Camera
The camera was created by multiple people, but as we know today, it was invented by Joseph Nicéphore Niépce. He took the first foto with silver chloride covered paper. -
Refrigerator
It was invented by Oliver Evans. It changed the world and it is important because it keeps food safe. When food is at the temperature that it should be, it increases the possibilities that it has bacterias -
Telephone
A device that allows people to communicate and have conversations even when they are too far away from each other. When someone speaks into a phone, an electric current carries the sound to the telephone of the person that person is talking to. -
Light bulb
An electric light that has a wire filament that is heated until it glows. it was created by Thomas Edison. He tested more than 3000 designs for bulbs between 1878 and 1880. -
Automobile
It was created by Carl Benz. It is form of transportation. Cars have changed society such as family life, the economy, and the environment -
Airplane
A type of aircraft, created by Wilbur and Orville Wright. It is a form of transportation. It can be used to transport people or heavy stuff. It can fly because it has an engine and wings. Some airplanes don't need an engine to fly. The first flight was on December 17, 1903.