What is "welteislehre"

Welteislehre (WEL ; "World Ice Theory" or "World Ice Doctrine"), also known as Glazial-Kosmogonie (Glacial Cosmogony), is a discredited cosmological concept proposed by Hanns Hörbiger, an Austrian engineer and inventor.

Hörbiger did not arrive at his ideas through research, but said that he had received it in a "vision" in 1894. According to his ideas, ice was the basic substance of all cosmic processes, and ice moons, ice planets, and the "global ether" (also made of ice) had determined the entire development of the universe.