As far as I can tell, they're saying that as the universe expands, everything in it is 'stretching out', and the so-called constants (speed of light, gravitational constant) that determine the ratios between the three dimensional qualities (space, time, and length) are therefore changing with it.
One of the things about the Big Bang theory is that it's basically based entirely off of extrapolation of current apparent motion of the visible galaxies. They all seem to be moving away from each other, and scientists traced the vectors and they all appear to point back to a single point. There's no actual evidence that everything was ever actually at that point, though. In fact there's some pretty compelling evidence that either it wasn't, or that constants like the speed of light weren't what they are now during that initial expansion.
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Sucrose Octanitrate.
Proof positive that with sufficient motivation, you can make anything explode.
One of the things about the Big Bang theory is that it's basically based entirely off of extrapolation of current apparent motion of the visible galaxies. They all seem to be moving away from each other, and scientists traced the vectors and they all appear to point back to a single point. There's no actual evidence that everything was ever actually at that point, though. In fact there's some pretty compelling evidence that either it wasn't, or that constants like the speed of light weren't what they are now during that initial expansion.
--
Sucrose Octanitrate.
Proof positive that with sufficient motivation, you can make anything explode.