• TheMadFool
    13.8k
    Dark matter fits the bill. It doesn't interact electromagnetically at any frequency, it's only detectable as extra gravitational attraction.

    https://en.wikipedia.org/wiki/Dark_matter
    fishfry

    :up: :ok: I'm familiar with the concept although only in very superficial terms. I'm told that the existence dark matter was hypothesized after normal matter failed to account for certain features of galactic spin behavior.
  • 180 Proof
    13.9k
    :up:

    No amount of philosophical theorizing could possibly give us knowledge of the actual world.fishfry
    Why do so many (on these fora) fail to understand this?
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