Because the sun must pass through a much thicker layer of the atmosphere. Doing so results in a higher chance that its radiation will be scattered. Ultimately, all the longest wavelengths of radiation get scattered while only the red ones remain.
The primariy reason the sunset is reddish is because of fine dust particles suspended in the air near the earth. When the light is coming at us "sideways" at sunset, this is more obvious. The sky is blue because the gasses in our atmosphere - mostly nitrogen - scatter blue light more than any other color.
A rock my have a reddish color if it has iron in it and is oxgen rich. Oxidation.
myoglobin gives the muscles the reddish brown color
your diaphragm is a reddish color
Mars
No. It's the chromosphere that glows with reddish color.
COPPER often has a reddish-orangey colour.
ReDdIsH
Yes, it is. It means of a color that includes some red (reddish leaves, reddish complexion).
if i remember it has a reddish purplelish color
Antares is visible in the summer evening sky(now - 8/24/09). If you live in the Northern Hemisphere, look to the south around 9:00pm - 10:00pm and you will see bright, reddish Antares, approximately 30 degrees above the horizon.
COPPER often has a reddish-orangey colour.