the Sun’s youth) None of these factors individually seems to play the dominant role in resolving the faint young Sun paradox. Some might have played an insignificant role or no role at all. For example, at the time of life’s origin, interstellar dust density and Earth’s obliquity were likely too low to have been contributors to the compensating warmth. Factors that undoubtedly played critical roles include greater amounts of carbon dioxide and methane in Earth’s atmosphere, greater volcanic release