Great video. Doesn't it take a bit of arrogance to ask, "why haven't the advanced alien civilizations made themselves known to us?" Couldn't it be that we aren't worth the effort? Perhaps there are so many wonderful things to see in the universe that taking the time to consider humanity would be like visiting Niagara Falls and stopping to admire the restroom faucets. Could it be that we're just not that intriguing? We could be the Kansas of the universe, a solar system nobody wants to travel through.