Here it is, positive proof of time travel:
Just look at this picture, this is an actual set of hiroglyphs in or near Abydos, it is astounding! Upper left, there is a helicopter, to its right a battletank and below the tank, some type of bulky, almost egg-shaped, aircraft. Judging from the looks it is probably a bomber.
Why I think time travel is the more likely explanation then say, aliens? Well, unless the aliens have the very same technology and come up with the same designs we did and do and will, which is highly unlikely, the machines are of human design and thus point towards time travel.
As cool as it would be, the explanation is, rather unfortunately, the mad scientist in me weeps, far more mundane. You now have the choice of just move on and accept the explanation, these hiroglyphs above actually depict what I just said, or you can click on the button below and take a look at the more resonable explanation.
What is your choice?
So, no matter what your choice was, I wish you a very pleasant day!