How is the new and old Olympics different?

The new Olympics are very different from the old Olympics. In the old Olympics only Greeks could participate now almost every country in the world. Also before only boys could be in the Olympics now boys and girls can participate in the Olympics. Before there where only a few activities now there are hundreds of sports in the Olympics. The old Olympics were from 1 day to three days now they are about two weeks. And lastly the old Olympics didn't have a lot of people the new Olympics have millions of people. How do you think there different?