Planetary geologists have calculated the relative portions of oxygen isotopes in samples from the Earth, the Moon, Mars, and meteorites, but had been very long not able to obtain reference values for that isotope ratios during the Sunshine, considered to become the same as People from the primordial solar nebula. https://hyperbaric-oxygen-chamber41739.blognody.com/40023679/about-cost-hyperbaric-oxygen-chamber