ark contained mana, mana has a property which essentially defies gravity and makes something less dense so it is lighter
to carry the ark, which was made of gold and wood, would have taken many men
unless it's weight was offset with a magical substance?
also would explain how they moved such heavy stones great distances all over the world
mana is derived from gold via alchemical processes
learned from the Egyptians..
but who did they learn from?