Extraterrestrial Life: An Anthology and Bibliography

Acad activity addition adenine amino acids ammonia appear Astron Astrophys atmosphere biochemical biological bonds carbon cells changes Chem chemical chondrites chromatography compounds concentration containing craters detected discussion earth effect electrons elements energy environment evidence evolution existence experiments extracts fact FIGURE formation formed hydrocarbons hydrogen cyanide ions known less light living lunar Mariner Mars Martian mass material matter means measurements mechanism meteorites mixture molecules Moon Nature observed obtained occur organic organic compounds origin oxidation oxygen particles peak period physical planetary planets possible present Press primitive probably problem Proc processes proteins radiation reaction recent reducing relatively reported Research samples Science shown similar soil solar solution Space spectra spectrum stars structure suggested surface synthesis Table temperature terrestrial tion ultraviolet University values Venus yield York