: The Valles Marineris canyon system stretches for 2,500 miles—nearly the width of Australia . In some places, it plunges 6 miles deep , dwarfing Earth’s Grand Canyon.
: Mars is currently the only known planet in the universe entirely inhabited by robots. From veterans like Curiosity to the life-hunting Perseverance , these mechanical explorers are busy uncovering secrets of ancient lakes and organic molecules . Red Planet
: If you stood on the Martian surface at dusk, you’d witness a blue sunset . Because of the way fine dust in the atmosphere scatters light, the colors are the reverse of Earth: pinkish-red skies during the day and a blue glow around the sun as it sets. : The Valles Marineris canyon system stretches for
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