GGR100H1 Lecture 4: GGR Lecture #4
Document Summary
The environmental prequel: from our earliest ancestors to the late. Cover global climate and evolutionary dynamics in our planet from 1. From the formation of our planet to the first-hard bodied organisms. Accounts for 90% of earths geological history. Stable crust by 4. 4 bya based on zircons (billion years old) Not well understood, little remains of precambrian world. Theories of the origins of life on planet earths. Early and medieval christianity: 1st-17th century middle east and europe, spontaneous generation maintained, not much challenged to early idea. Theories of the origins of life on planet earth. Panspermia and exogenesis various life on our planet originated from somewhere else. Chemical evolution molecules to amino acids. Miller-urey experiment: recreated theorized conditions of early earths, demonstrated that amino acids have emerged this way. Looks out how amino acids can be combined together. All life traced back to the lua.
