In this article I discuss the empirical support for the Expanding Earth hypothesis that I have become aware of quite recently.
Assuming that the Sun was faint so that the temperature at the surface of Earth was below the freezing point, one ends up with conflict with the isotopic determination of the temperature giving a temperature of oceans slightly higher than the temperature 38 C above which marine invertebrates cannot survive. The temperature about 30 degrees allows life but this requires a slightly lower amount of O18 isotope than prevailing in the recent oceans. The paradox can be solved if the warm water originated from underground oceans and mixed with the non-oxygenated water (or actually ice) at the surface of Earth so that the isotopic fraction was reduced. The optimal situation for life would have been at depths of order kilometer and one can say that life had no other option than developing underground.
For a summary of earlier postings see Latest progress in TGD.
For the lists of articles (most of them published in journals founded by Huping Hu) and books about TGD see this.