Quote Originally Posted by ugnex3
If anyone is willing to watch Ancient Aliens on the history channel on Thursdays at 9/8C then research a bit on reptilian humanoids, Sumerian tablets with helicopters and the Pyramids of Giza and Bosnia, you'll find this article a lot easier to believe...
When the future generations find some stones left from us they'll also think the same. That doesn't prove the aliens were growers

Here another theory from me. Cannabis was a gift from earth for us to develop more and catch the aliens but they didn't want us to get that and planted tobacco on our planet. How about that?