Chemical evolution may refer to:
- Stellar nucleosynthesis, the creation of chemical elements by stellar thermonuclear fusion or supernovae
- Abiogenesis, the transition from nonliving elements to living systems
- Molecular evolution, evolution at the scale of molecules
- Gas evolution reaction, the process of a gas bubbling out (or evolving) from a solution
- Oxygen evolution, the process of generating molecular oxygen through chemical reaction
Famous quotes containing the words chemical and/or evolution:
“We do not want actions, but men; not a chemical drop of water, but rain; the spirit that sheds and showers actions, countless, endless actions.”
—Ralph Waldo Emerson (18031882)
“Analyze theory-building how we will, we all must start in the middle. Our conceptual firsts are middle-sized, middle-distanced objects, and our introduction to them and to everything comes midway in the cultural evolution of the race.”
—Willard Van Orman Quine (b. 1908)