When the tides are just right from the planets and moon aligning 'just-so', ancient and dread remnants of the long-vanished past of our world are revealed as they rise up from beneath the waves.
To scholars such is an open invitation to delve the secrets of history many hundreds of millions of years old...
...to others, it is a foreshadowing of Armageddon and worse, but such not being limited to just this mere world of ours.