pH and color change
While the early atmosphere simulated by Miller and Urey consisted of methane, ammonia, hydrogen and heated de-ionized water, subjected to electric sparks, Origins of Life: Experiment #1.4 now also integrates currently existing gases such as nitrogen, oxygen and carbon dioxide to drive the reactions. The display also reflects the presence, today, of large oceans and thus contains seawater rich in sodium, chlorine, calcium, sulfur and potassium. It further includes minerals such as calcium carbonate and calcium phosphate, representing lime, calcite, marble and apatite. The outcomes are unpredictable – will unexpected molecules indeed be synthesized?