Extraterrestrial atmosphere star undergoing runaway greenhouse effect. For planets in the habitable zone, it was thought that water photolysis would be strongly limited by cold-trapping of water vapour in the lower atmosphere. However, the extent of HO cold-trapping depends strongly on the amount of non-condensible gases in the atmosphere such as nitrogen N and argon. In the absence of such gases, the likelihood of build-up of oxygen also depends in complex ways on the planet's accretion history, internal chemistry, atmospheric dynamics, and orbital state. Therefore, oxygen, on its own, cannot be considered a robust biosignature. The ratio of nitrogen and argon to
The More Abundant Life I am come that they might have life, and that they might have it more abundantly." Roosevelt, an Episcopalian, would also have been familiar with a similar phrase used in the collect for the Fifth Sunday after the Epiphany in the "Book of Common Prayer". The More Abundant Life The More Abundant Life was a phrase of scriptural flavor used by the U.S. President Franklin D. Roosevelt in his address before the Inter-American Conference for the Maintenance of Peace in Buenos Aires, Argentina, December 1, 1936, to signify the improved living conditions and enlarged cultural and economic opportunities available to