Geography · Climatology and Earth Systems

How does the 'Faint Young Sun paradox' challenge our scientific understanding of early Earth's climate?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1It shows Earth was excessively hot due to runaway greenhouse conditions from high solar radiation.
2It indicates that early solar output was too weak to prevent global freezing, yet geological records show liquid water existed.✓
3It suggests the Moon once possessed a dense atmosphere capable of retaining heat.
4It implies there was absolutely no liquid water present on early Earth.

Correct answer

It indicates that early solar output was too weak to prevent global freezing, yet geological records show liquid water existed.

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