A Solution to the Faint-Sun Paradox Reveals a Narrow Window for Life
Our sun is getting brighter. If you could travel back in time to the dawn of the solar system 4.5 billion years ago, you’d find a star that was about 30% dimmer than it is now. Over the subsequent eons, it has shone more and more brilliantly — a function of the nuclear fusion process that takes place in the cores of stars like our own — and it will continue to do so until the end of its life…
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