Labels:bulletin board | reckoner | sky OCR: This possibility raises dilemma How cauld life have survived in the relatively cold climate that should accompany weaker sun? solution to the faint early sun paradox, as if ic called, was offered by Carl Sagan and George Mullen 0i Cornell University ir 1970 The two scientists suggested that methane and ammonia which are very effective at trapping infrared radiation, were quite abundant These gases could have created super -greenhouse effect The idea was criticized on the basis that such gases were highly reactive and have short lifetimes in the atmosphere In the late 1970s Veerabhadran Ramanathan now at the Scripps Institution of Oceanography, and Robert D Cess and Tobias Owen of the State University of New York at Stony Brook proposed another solution They postulated that there was no nee ...
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