Mars MAVEN arrival: NASA mission will investigate Mars’ climate.

Why Did Mars Go From a Warm, Wet Planet to a Chilly Desert? (Video.)  

Why Did Mars Go From a Warm, Wet Planet to a Chilly Desert? (Video.)  

Slate in motion.
Sept. 21 2014 2:25 PM

To Mars, Again

NASA's MAVEN will investigate the decline of the red planet’s climate.

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Mars and Sun

Daniil Smirnov

The Mars Atmosphere and Volatile Evolution probe, known as MAVEN, will arrive to the red planet’s outer reaches at about 9:50 p.m. on Sunday.

Dallas Jensen is a regular video contributor to Slate.