'''Chemical evolution''' describes a number of theories that assert that [[Origin of life|life originated]] through purely chemical transformations of nonliving matter.<ref>http://www.iscid.org/encyclopedia/Chemical_Evolution</ref>The idea is critiqued in ''[[The Mystery of Life’s Origin]]'', by materials scientist [[Walter L. Bradley]], geochemist [[Roger L. Olsen]] and chemist [[Charles B. Thaxton]]
* "chemical evolution," the idea that [[unguided]] natural processes produced the first living cells abiotically, from non-living materials<ref> [http://www.newworldencyclopedia.org/entry/Intelligent_design Intelligent design] - New World Encyclopedia</ref>