The whole ultra dense H or hydrino story still defies rational explanation
ultradense H has a rational explanation.. also hydrinos
in physics there are many rational explanations..
eg Celani et al ... Meulenberg... Mills
https://pdfs.semanticscholar.o…80610e2353e6779735565.pdf
https://mospace.umsystem.edu/x…df?sequence=1&isAllowed=y
however not all explanations are experimentally verified.