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« on: December 30, 2013, 08:07:54 PM »
I think if aliens visited Earth in the past, it wasn't to build monuments or mate with humans, but to obtain resources. How they got here would be a mystery, but scientists are theorizing ways in which interstellar travel could be achieved, the most recent I've heard of involves forming a bubble of what they call negative energy around the ship which would essentially compress time-space in front of the ship. The comparison they use is that it would be like having to travel the diameter of a pizza, but you get to cut out a strip of pizza perpendicular to the diameter. The problem with such a method is the immense amount of energy required to create a bubble of negative energy. Nobody is sure how that would be achieved.