There is only one way to experience lunar gravity while still on Earth, or rather a few thousand feet above its surface: on a parabolic flight. In this exclusive mini-documentary, Space.com reporter ...
Insane Curiosity on MSN
How Mars And Venus Lost The Conditions That Made Them Habitable
Mars and Venus may look hostile today, but scientists believe they were once Earth-like. This documentary explores their hidden pasts and what changed their fate.
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