Example image of eyePlorer eyePlorer map for 'Hypothetical types of biochemistry': Biochemistry Earth Extraterrestrial life Carbon Water Science fiction Amino acid Sugar Atom Carbon chauvinism Human Carbon group Chemical property Group (periodic table) Silicon Atomic radius Covalent bond Mass Alkane Chemical compound Hydrocarbon Hydrogen Properties of water Silane Oxygen Polymer Silicone Interstellar medium Terrestrial planet Diatom Graham Cairns-Smith Nitrogen Phosphorus Macromolecule Nitrogen fixation Ammonia Anaerobic organism Bacteria Legume Nitrogen dioxide Plant Symbiosis Dinitrogen tetroxide Nitric oxide Nitrous oxide Carbon dioxide Methane Bond energy Arsenic Arsenobetaine