Otherworldly Waters

The answer to the mysterious craters in the ocean floor was finally found in an analysis of the water itself. Traces of certain minerals and chemical compositions proved that the water did in fact not belong to the same planet. It was transported here in the form of gargantuan blocks of ice that were hurled down on the planet. The ice blocks crashed, cracked into splinters and melted, eventually covering almost the entire surface with water. It was an absolutely monumental undertaking, but there is nothing that hints to why it was carried out.

The command below will trigger the "Otherworldly Waters" event in Stellaris:

When this event fires, you can choose between the following option:

• Keep digging!