Geologic column

541 Million Years ago: Cambrian explosion  / transition from Neptunian planet to Ocean world

252 Million Years ago: Earth orbits the Sun / continents form / End of Ocean world / shallow seas

64 Million Years ago: Modern Earth / Continents are mostly fully dry land

P/T Boundry high contrast

 

 

 

 

Earth ocean planet

 

Infinity "paradoxes"

https://en.wikipedia.org/wiki/Ross%E2%80%93Littlewood_paradox

 https://en.wikipedia.org/wiki/Thomson%27s_lamp

 https://en.wikipedia.org/wiki/Supertask 

 https://en.wikipedia.org/wiki/Category:Paradoxes_of_infinity