Phillip Helbig---remove CLOTHES to reply wrote:

2. Both EM and GR are 1/r^2 interactions.

Isn't this just geometry together with massless exchange particles?

GR has gravitoelectric and
gravitomagnetic phenomena that are remarkably analogous to EM
phenomena.

Isn't this just a consequence of special relativity?

Regardless of their origins, these known characteristics of GR and EM
are similar. Whether these particular similarities are important clues
to a possible unification or just secondary curiosities remains to be
seen.

But here is something potentially exciting that I have come across that
is directly related to the G(n-1), or "strong gravity"/revised Planck
scale topic.

A team led by Martin Tajmar has reported detecting HUGE gravitomagnetic
effects produced by rotating superconducting rings. The strength of
these effects is measured to be 10^17 times what would be expected
using G. They have repeated their experiments on the order of 250 times
and conducted a battery of control experiments. Other groups are in the
process of repeating their results.

You can find documentation of their work at www.arxiv.org by searching
on "Tajmar". There about 4 papers from the past year. Also see Physica
C, 432, p. 167, 2006.

Maybe this is "cold fusion" all over again, but what I have seen makes
me think that they have detected something that is real and that is not
explained by anything conventional.

One might say: "Well 10^17 is still not 10^38", but I would reply that
10^17 is a LOT different than 1, and the unique physical system they
are studying (superconductors) may involve equally unique phenomena of
the largely unexplored G/G(n-1) interface.