Great subject and one of much speculation, thank you for sharing.... wanted to pass the following links along to any with an interest in this subject???
Time travel is impossible!
Read Q& A in its entirety???
http://www.divineadvancedhumanbeings.com/answers/i-am-completely-off-topic-so-feel-free-not-to-answer-but-i-thought-i-might-as-well-ask-just-in-case-travelling-from-here-through-other-dimensions-typically-involves-leaving-the-space-time-continuu/Also, you may be interested in the following article referencing time travel???
These advanced being-aliens are not from the future. Time travel for them and all beings, for that matter, is impossible regardless of the technology that they possess. Even God cannot time travel!
http://www.divineadvancedhumanbeings.com/do-aliens-exist/ 
