We've photographed Mars from orbit, drilled into its surface and sniffed its atmosphere looking for clues on how a warmer, wetter world went cold and dry. Now it's time to go deep.
Astro Bob blog: What's inside Mars? We'll need InSight to find out
We've photographed Mars from orbit, drilled into its surface and sniffed its atmosphere looking for clues on how a warmer, wetter world went cold and dry. Now it's time to go deep.
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