If I used time travel machine, I would like to go to the place where first internet was born. Now that it is necessary for us but at that time it must have seemed something strange. So I want to look for a person generating it and teach them that it is the invention as changing the future. In the sense of turning point, I also want to see the moment that it occurred to people using the fire and arrows. It is very primitive but essential for us all the time. There are a lot of things used daily life and that has their beginning, so I would eager to see it.