Greatest Invention of Man

I think the greatest invention of a man is Internet. We can do just about anything with help of internet. It is not just used for communication but helps in getting lot of information and also used as a tool for entertainment. I just can't imagine my life without Internet. We can communicate with a person who is in other country in a fraction of seconds. We can even view the other person with the help of webcam. It feels as if the person is sitting next to you. There are so many sites where we can search for information related to anything in the universe. You can find the information within seconds. This is the mind-blowing invention.