Wow, that's nonsense. Every color travels as far as the others. Go look up the science, yourself, seeker. Red visible light scatters least in air, so the circle of the sun appears more red when the most atmosphere is between us and the sun, when the most atmosphere is between us and the sun -- when the sun is at the horizon. The sky is bright light blue at noon, because so much blue light scatters from it, at sunset the sky darkens, still a highly scattered blue, but there's much less light getting through. The red then predominates because it scatters the least.