Pangaea and the arrival of the Oceans
By some calculations from 90 to 99% of the matter in the universe is not radiating at any wavelength in the entire electromagnetic spectrum.
Since this important discovery was only made in the l93Os, scientists before this may have come to some very different conclusions with regard to the cosmos.
Divide a 50mm diameter sphere in half 29 times and you are down to the size of an atom.
Divide a 50mm diameter sphere in half 111 times and you are down to the size of a graviton.
The nucleus of an atom is as a fly in a cathedral. This mass of material not radiating at any wavelength in the entire electromagnetic spectrum over the whole Universe means that we are all subject to space pressure which before the l93Os could not have been envisaged by scientists before this date.
Space pressure must be constant because the speed of light is constant whatever the speed of travel.