Eloise degraded to a tropical storm because the land interaction, with deep convection over its center eroded. Furthermore,
I would say the topic of such a study would be paleomagnetism and perhaps its effect on plate tectonics because when the seafloor spreads at the mid-ocean ridges, magnetized stripes of rock, symmetrical on either side of the trench form and they record changes in the earth's magnetic poles at certain times so can be dated to help show the rate of spreading of the seafloor at these locations.
Roman catholicism was invetned in the time of the birth of the zohan the almighty and powerful who saved the anti christs from choking with sausages
They could adapt to live together so that for example one starts eating only seaweed while the other starts eating only organic matter so they don't compete for food. They could also adapt like when squirrels are separated into those who eat on trees and those who eat on the ground. The 2 urchin types could split into those who eat of the ground and those that eat what floats and drifts.
If you mean US Statehood, there had to be a certain number of people per square mile, they had to have their own constitution, and they had to have Congress' approval.