Life Beyond Earth: The Intelligent Earthling's Guide to Life in the Universe

amino acids amount atmosphere atoms bacteria bacterium biology biosphere cell chain Chapter chemical energy chemical reactions chemistry clouds complex compounds contain creatures cycles density detect develop discussed Earth Earthlife electrons emit energy flow environment enzymes evolution evolved example exist experiments exploration extraterrestrial free energy function galaxy Ganymede H-bit heat helium human hydrogen interior interstellar involved Jupiter lander level of COSMEL light liquid living things magnetic forces Mars Martian matter ment metabolism meters methanogens microorganisms million mixture neutron star nitrogen nonliving nucleic acid o-hydrogen object occur ocean orbit organic molecules oxygen photons photosynthesis planet Plate possible prebiotic predestinist present probe produced properties proteins radiation random replication ribosome rotifer sample scientists similar soil solar system solid soup source of free space stored substances sugar sunlight surface temperature tion ultraviolet Universe Venus Viking white dwarf