Time travel is my current interest. It's completely possible, the only problem, our bodies. At this time, we don't have the technology to brace our bodies to go how fast they would need to travel in order to go forward in time. Going back in time, that's a little bit more tricky. Basically, we'd have to be able to predict where wormholes would appear and be able to get there within nanoseconds. To go forward in time, we'd only have to have an object go 1,080,000,000 kilometers per hour. Roughly, the speed of light.
On a different note, but somewhat related, there are, by my calculations, 2.455 x 10^12 parallel universe's.