This problem of why the Earth was not heavily glaciated despite weak solar radiation has become known as the 'faint early Sun paradox'. For close to forty years, several solutions have been ...

The Moon will pass into Earth's shadow and appear to turn red on the night of March 13 or early in the morning of March 14, depending on ...

bacteria in Earth's young ocean started to produce oxygen through photosynthesis. Around 2.6 billion years ago, bacteria really started to bloom and oxygen levels followed suit. This oxygen combined ...