The seven wonders of the ancient world is a list of very important buildings a great Greek historian called Herodotus wrote, over two thousand years ago. They are seven because he only wrote about the greatest structures he knew, he did not know much Asia and the Americas. People have always felt the need to create lists. Lists are accounts of vital places, places, people or events. About two.
In today’s world, nuclear energy is a hot topic. It is a wonders of modern science. It has both advantages and disadvantages in the modern civilization of the world. A relatively small amount of uranium can be used to produce enough electricity to power a city of about half a million people. It has low cost, low pollution to the environment.