Part 4/10:
Another proposition implies that during its early years, while the Sun was cooler, it may have been more active, resulting in a stronger solar wind that contributed some warmth. Yet, these explanations alone fell short of fully resolving the paradox. Eventually, scientists arrived at a more familiar conclusion—the greenhouse effect. In those primordial days, the atmosphere likely contained abundant greenhouse gases that retained warmth, fostering a milder climate, even accounting for similar conditions on Mars, which also hosted liquid water.