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
Love Is the Sweetest Thing among others, have made recordings :- First introductory verse: Start of main refrain (nowadays "Verse One"): End of main refrain (nowadays "Verse Three"): For other works containing the phrase "The Sweetest Thing" see Sweetest Thing (disambiguation). Love Is the Sweetest Thing "Love Is the Sweetest Thing" is a popular song written in 1932 by British band leader and singer Ray Noble. Using guest vocalist Al Bowlly, Noble's recording was a big hit on both sides of the Atlantic, bringing Noble his first American success. It was published by Redwood Music. Like most compositions published in the period (commonly called Tin