A good web site, but it only lists possible formulas and does not explain how they work or the fundamental theory behind them.
When I clicked the Math page, for example, I get summaries of maths taught in college and then links to Amazon.com books to buy. But no real definition or example of...
Consider that all matter and energy in the early universe was closer together than it is now. But at the same time moving away from the center.
Entropy might have a dependence on the curve of space/time, as the less curve the more entropy. So matter and energy that are not as close together...