An atmospheric haze around a faraway planet – like the one which probably shrouded and cooled the young Earth – could show that the world is potentially habitable, or even be a sign of life itself. In new research, UW doctoral student Giada Arney and team chose to study Earth in its Archean era 2 ½ billion years back, because it is, as Arney said, “the most alien planet we have geochemical data for.”
The work builds on geol...
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