Dark Matter: Time Travel, etc.

http://artbell.com
A nice open lines show about time travel & other things.
https://www.youtube.com/user/DMArchive
Part of the implications of time travel is that this world & universe is part of an interactive recording & projection of space & time. If you can't physically travel through time, due to the lack of the appropriate vehicle, the next best thing is to examine certain pictures & other artifacts.
http://jfvrinfo.blogspot.ca/2013/09/the-city-of-honolulu-and-time-travel-etc.html
Observing various patterns of symbolism, coincidence & synchronicity, can reveal a lot about this interactive cosmic recording.

Time travel can be both & good & dangerous technology.
Perhaps some of these crafts aren't from this world & could be time traveling drones from other places.
The basic earth drones are stuck in this time & world & are simply flying cameras.
http://gizmodo.com/372263/spy-drones-coming-soon-to-the-us-at+st-walkers-to-follow-next
In some other cases they are just flying battle droids.
http://www.brookings.edu/research/papers/2013/03/08-drones-singer
The movies continually provide possible glimpses of future tech.
http://aconstantlyracingmind.blogspot.ca/2013/04/oblivion-analysis-of-sci-fi-tropes-and.html

Visit, throughancienteyes.blogspot.ca/2013/08/elysium-life-after-death-in-new-world.html to see more fascinating observations about new & old technology on the horizon.

Over the years, various movies & books have implied that even if you could temporarily change some things.
http://en.wikipedia.org/wiki/The_Time_Machine_(2002_film)#Plot
Certain things would still end up happening, one way or another.
http://en.wikipedia.org/wiki/11/22/63#Plot
The DZ movie provides a pretty good visual as to how the path of certain things changed.
http://en.wikipedia.org/wiki/The_Dead_Zone_(film)#Plot
Telepathic or psychic time travel seems to possible with several writers & artists. Although they don't physically jump to another point in time, they seem to acquire a temporary sensory link to another key moment in time. Sometimes it could be in the form of a vision or just a sense to form certain words to describe the potential unfolding scenario of something.
Morgan_Robertson writes, The_Wreck_of_the_Titan about 14 years before the sinking of the Titanic.