No.. I have a very logical explanation for this... well 2 of them..

1. We were here just like we are now with internet TV cars etc thousands of years ago.. humanity built itself up to the point we imploded on ourselves ultimately causing our own demise. Only a few survived which in return allowed humans to once again thrive.. well maybe it was a chimp or 2 because I do believe in evolution..

2. Theory is that the aliens are actually not aliens and are us time traveling back in time... because let's face it.. it is plausible. We time travel all the time... set 2 old fashioned dial watches at the exact same time down to the second.. leave one at home and take one with you and drive for several hours.. when you match the 2 watches up in the end the times will be different!!!

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