Bible scholars generally favor the idea that the expanse mentioned in Genesis - a heavy atmosphere of water vapor that is said to have given the entire earth a

Bible scholars generally favor the idea that the expanse mentioned in Genesis - a heavy atmosphere of water vapor that is said to have given the entire earth a tropical climate - could have had a significant effect on atmospheric density, which I personally find an interesting correlation when discussing this topic. Combined with the snap frozen mammoth hypothesis, it's interesting to think that if there were a heavy atmosphere of liquid, and it suddenly fell, it could explain why dinosaurs are non-feasible in todays atmosphere, why a sudden change in atmospheric density could be possible, the paradox of a whole-earth tropic, the snap frozen mammoths, and also the sudden extinction of large land animals such as dinosaurs. (Anecdotally, a question I wonder: is it feasible that humans would live longer in higher pressures and lower UV levels, such as to 900 years?)