TIL the sky looks blue because gases and particles in the air scatter light from the sun and shorter blue wavelength light is scattered more than other wavelengths, so we see more of the blue than other colors. Sunsets are more atmosphere scattering most of the blue so you see more reds and yellows

https://spaceplace.nasa.gov/blue-sky/en/
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1go4j27/til_the_sky_looks_blue_because_gases_and/