One of the more popular high-tech articles I've posted in recent months dealt with the real yet theoretical possibilities of time travel. An interesting piece I found while surfing the Net explains that time travel is synonymous with movement faster than the speed of light, one of the more striking aspects of special relativity.
If you enjoy wading through the physics of time travel via the prism of faster than light travel -- complete with multi-colored graphs -- you'll be amazed just how much energy people expend to advance our body of knowledge about a theory.
The Culture.org September 12, 2003