the.com/mars atmosphere
a whole planet's air, thinner than a whisper, dreaming of being thicker.
means the thin layer of mostly carbon dioxide gas surrounding mars, less than 1% as dense as earth's atmosphere.
from mars kept a thick atmosphere billions of years ago, until its dead core stopped generating a magnetic field, leaving solar wind to strip the gas away particle by particle over eons.
composition95% carbon dioxide, barely any oxygen
pressureabout 0.6% of earth's sea-level pressure
weatherproduces planet-swallowing dust storms for months
future plansterraforming proposals want to thicken it artificially