People from cultures across the world have been looking at Mars since ancient times. Because it appears reddish, it has often been called the red planet.
from Is Mars Really Red? A Physicist Explains The Planet's Reddish Hue https://ift.tt/8fnPSZV
from Is Mars Really Red? A Physicist Explains The Planet's Reddish Hue https://ift.tt/8fnPSZV
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