Well, idk; I watched the video and to ME he spoke a lot of words to try to explain (some what poorly, imo), other dimensions with a 3-D model, when ancient philosophers (vedic; firstly) explained the many "worlds" and how to access them w/ mantras, meditations, some use invocations; and good ol' drugs, I believe, aid us in inter-dimensional travel; like astral projection. But don't take me wrong; I mean no disrespect to Carl Sagan; just here he sounds like he fell short. I think if you've tripped hard, you've traveled into another D, Like with DMT. (imfuao)Thanks, though, it made me think!