Introduces nucleic acids, lipids, proteins and carbohydrates. Starts with Earth 4 billion years ago & asks how could the chemicals of life have arisen? A simulation of the famous Stanley Miller experiment is shown. One of the oldest fossils, a stromolite is shown, at the same time as its living descendants. The first biomolecule was probably a self assembling polymer - Nucleic acid. DNA reproduction. Then lipids and their role as cell membranes are discussed. Proteins get the action going - demo of an enzyme reaction.