The amount of salt in the sea is a strange constant. The combined oceans contain about four and a half million cubic miles of salt – enough to cover the entire United States to a depth of one mile. We wouldn’t be here without it, but we don’t understand why we are here or how the salt in the sea remains constant. The water within us has the same saltiness as the Precambrian seas of three billion years ago. There is evidence that the salinity of the oceans has changed little since their formation.
Water is the only molecule that is lighter in its solid form than when it is liquid – a remarkable property – which allows the sea not to completely freeze solid from the bottom up, killing all that lives in it. We know more about the surface of Mars than we do about the seabed.
Combination print created by Hag by Combination printing. Surreal photography.