An atmospheric haze around a faraway planet 鈥� like the one which probably shrouded and cooled the young Earth 鈥� could show that the world is potentially habitable, or even be a sign of life itself.


An atmospheric haze around a faraway planet 鈥� like the one which probably shrouded and cooled the young Earth 鈥� could show that the world is potentially habitable, or even be a sign of life itself.