"All that's to come
and everything under
the sun is in tune
but the sun
is eclipsed by the moon."
from "Eclipse" on the 1973 LP release "Dark Side of the Moon"
For generations, humans have been trying to link sound and light together. We have succeeded.
"Shh! Listen! Someone's coming! I think -- I think it might be us!"
J. K. ROWLING, Harry Potter and the Prisoner of Azkaban
Imagine if we could time travel without changing history. If we could go back 50 or 100 years would people view our technology as magic? If we were visited by time travelers from the future, would their technology be magic to us?