Two wildly different flora genealogies sprang up, with the terminator as an unbreachable dividing line, and battleground. Farside plants adapted to the sun’s yellow light: they were capable of tolerating the long nights accompanying conjunction, the cooler temperatures. Nearside was the province of red light, falling without end: its black-leafed plants were taller, stronger, more vigorous, yet they were unable to conquer farside. Night killed them, yellow light alone was insufficient to drive their demanding photosynthesis, and the scattered refraction of red light by the thick atmosphere
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