Topic: Time Travel Technology
The ability to control time in both a forward and backwards direction is possible within the laws of our mathematics and physics. The chart below (click for larger view) compares ten different technologies an methods. Key characteristics are identified for each and described below.

Source: http://www.andersoninstitute.com/time-c logies.htm
It's clear that I'll never have access to the technology, otherwise I would have made some money in the stock market by now ![]()