Electricity flows in our bodies. It allows nerve cells to work with muscle cells. They help our bodies move. Electricity does not only do that but it also powers many tools that we use. Computers, televisions, light bulbs, and refrigerators all use electrical energy.
For thousands of years people did not know about electricity. Then, about 2,500 years ago, the ancient Greeks began to study the world around them. They wanted to know how the world worked. The Greek scientist Thales of Miletus did experiments with a fossil called amber. He rubbed it with a piece of wool or fur. Then he held a feather near the amber. The feather stuck to it. Whenever Thales did the experiment, the feather stuck to the amber. He had the invisible force that we now call electricity.
For thousands of years people did not know about electricity. Then, about 2,500 years ago, the ancient Greeks began to study the world around them. They wanted to know how the world worked. The Greek scientist Thales of Miletus did experiments with a fossil called amber. He rubbed it with a piece of wool or fur. Then he held a feather near the amber. The feather stuck to it. Whenever Thales did the experiment, the feather stuck to the amber. He had the invisible force that we now call electricity.