from single to multi-universe

Galileo four hundred years ago, mankind from the first time since the telescope point to the sky, on the continuous survival of our expanding universe of understanding. First of all, he observed from the telescope proved Copernicus's theory of the solar center, wrapped in the following four hundred years, scientists have first to understand the solar system in the Milky Way is just one of more than one hundred billion stars. Over the past hundred years, astronomers have further found that the universe, the Milky Way is only one of 10 billion galaxies. Over the past 20 years and we know that 95% of the universe called dark element of quality and a dark can , the nature of scientists are still unable to determine, what is even more surprising is that our universe may not be the only one, but a universe of hundreds of thousands. Follow the footsteps of Galileo along the way, we can not help but ask, mankind's position in the universe for that?