How to Build a Time Machine   In order to build a time machine we are going to need to understand some basic principles about how to manipulate time to benefit us. Theory states that inside a black hole time really doesn't exist, at least not in the way that we think about time. But we just can't simply stroll our way into a black hole knowing there is no possible exists, so I bring in a theory made by John Gribbin in his article "Everything You Always Wanted To Know About… Time Travel". In his article he brings the idea that a white hole, which is exactly opposite of a black hole, by it pushes things away from it and gives off light. He believes that these two phenomenons are connected by what is called a wormhole, where time is in a completely different context and will make it possible to travel amazingly far distances and different "times". http://www.novagate.com/~defiant/lightwave/ATLP/wormhole.html Problems do arise though with this theory, for one a wormhole is very unstable and traveling through one can disrupt it and possible make it collapse, and two the possibility of entering into a black hole is not that hard at all, but being able to get out without traveling at speeds greater than that of light is very difficult. To make this type of travel possible we need to understand that a wormhole is stable with an electron field present or with the black hole itself rotating. This action reverses the force of gravity that is trying to slam the "door" to the wormhole shut, and it allows us to not have to travel at light speed to escape the gravitational pull from the black hole. One of the main worries with experimenting with this is that nobody knows where the white hole that is the end of the wormhole exists. It could be right next the black hole or it could be far away from any civilization and without an exact way to get back home it is very scary. To make our very own wormhole would be very difficult, but not impossible. It is made up of antigravity and negative energy, both of which are hard to comprehend in this moment of our technology. Some theories that are given out on how to produce antigravity are like the same way as how to "cancel out" sound waves. First you take a normal sound wave, analyze it through the help of a computer, and find the exact, exact opposite of that wave and play it back while the original sound wave is being played. The product is absolute silence! Now if there was a way in which to do the same production of gravitational waves and "playing" them back to form an antigravitational wave would give the possibility to form a wormhole, with the help from a black hole too. The last ingredient need for the time machine is an actual space craft that is capable of high speeds as to use during the escape from the black hole, and an human willing to risk their life to prove if the theory is correct. http://www.iit.edu/%7Ebosabri/time.htmll