Extraterrestrial Life: An Anthology and Bibliography

Acad activity addition adenine amino acids appears Astron atmosphere biochemical biological bonds carbon cells changes Chem chemical chondrites chromatography compounds containing crater detected detector direction earth effect electrons elements energy environment evidence evolution existence experiments extracts fact field FIGURE formation formed hydrocarbons hydrogen hydrogen cyanide ions known less light living London lunar magnetic Mariner Mars Martian mass material matter means measurements meteorites mixture molecules Moon Nature observed obtained occur organic origin oxidation particles peak period physical planet planetary possible present Press pressure primitive probably problem Proc processes proteins radiation range reaction reason reducing reflectivity reported samples Science shown similar soil solar solution space spectra spectrum stain stars structure studies suggested surface synthesis Table temperature terrestrial thermal tion ultraviolet University values Venus yield York