This is part of why I love Lovecraft. His brand of science fiction experimented with what we consider to be the nature of science, intelligence, and the universe. He was probing at what could be and what we don't know, rather than just rewording what we know now.

  This is the hour when moonstruck poets know
  What fungi sprout in Yuggoth, and what scents
  And tints of flowers fill Nithon’s continents,
  Such as in no poor earthly garden blow.

> The Outer Beings are perhaps the most marvellous organic things in or beyond all space and time-members of a cosmos-wide race of which all other life-forms are merely degenerate variants. They are more vegetable than animal, if these terms can be applied to the sort of matter composing them, and have a somewhat fungoid structure; though the presence of a chlorophyll-like substance and a very singular nutritive system differentiate them altogether from true cormophytic fungi. Indeed, the type is composed of a form of matter totally alien to our part of space - with electrons having a wholly different vibration-rate. That is why the beings cannot be photographed on the ordinary camera films and plates of our known universe, even though our eyes can see them. With proper knowledge, however, any good chemist could make a photographic emulsion which would record their images.