The more that we learn about the evolution of Earth as a planet, the more I think that the development of complex life is an exceedingly low probability event.

The more that we learn about the evolution of Earth as a planet, the more I think that the development of complex life is an exceedingly low probability event. So many things had to go “just right” for conditions on Earth to allow the formation of life. It’s mind blowing to me that one of those things is the collision of a proto Earth that created the Moon which was just the right size to stabilize the Earth’s rotation. On top of that, life on Earth required, vulcanism, plate tectonics, carbon cycle, magnetic field, collection of water, location and size of Jupiter and clearing of asteroids, near extinction events that were survivable by some life, etc….