@pyrogram: Well neither one is really energy, but if you want to define it like that, light is electromagnetic energy and sound is kinetic energy. W...
Well your idea is kind of more like having a recollection of the past as opposed to true time travel. Things only exist in the universe at one point...
The difference is that the light travels through a medium, and it degrades. Everytime it passes through a crystal of space dust, or gets its traject...
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