There are plenty of other 'alternative' physics ideas around - I was once sent a book called "A Fresh Look at the Universe" by Geoffrey Balston.
I haven't seen Witt's 'Our Undiscovered Universe', (but have looked at his webpage) but it does sound similar to AFLatU.
AFLatU and other similar books all see to be written by people that did high-school or first year uni physics and no more. As a result, they usually have a highly distorted view of what physics is - basically high school and 1st year (and 2nd) uni physics is usually WRONG! It mostly covers classical or newtonion physics and as such is only a very rough approximation to more advanced quantum mechanics and relativity.
When you apply classical physics to the more philosophical aspects of the universe - like how and why are we here - then you just get bizzare stuff coming out. The classical case being that of Determinism, which basically states that any cause has an effect. Another way of putting this is that if we knew enough information about the Universe - the position and energy of all particles - then we could calculate everything that has happened and will happen. Or to put it another way, what will happen will happen because the pre-existing state of the Universe means that it must be so. There is no such thing as 'free will'.
This then was used as an excuse for various acts of war, invasion, genocide etc. 'We are killing them all because that is what is meant to happen'.
It is quite easy to show however, using quantum mechanics that all this is not so - that cause and effect are not so closely related (especially on an atomic and cosmological scale) and that free can exist.
Anyway, back to the matter in hand, AFLatU basically was a mis-application of limited Newtoniam physics to cosmology.
As I said, I haven't seen OUU, but quite probably it is something similar.
Not to say that he IS wrong. He might be right, but I doubt it. When Einstein first published the papers on SR and GR, and when Heaviside published his work on the ionosphere, "Maxwell's" equations, induction theory of transmission lines, when Chandrasekhar did his work, the Establishment may have said it was rubbish, but there were instantly open minded people who did have the necessary mathematics and physics to understand that they were right, and it wasn't long before the new paradigm took hold.
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