How can I travel back into time, without being dead?

Nova program said time travel is possible but you wou need someting to go inside black hoe. What is good matereal for making this ship? Whate are black hoes? Where in space are there some? Can you find a black hoe here on the earth? I need a good scientist to answer this question please, or a good website.

You can find black hoes anywhere, dude. What you really need is a Black Hole, which incidentally is not related to the other one. Google Black Holes and read all about it.