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Paper
Microgravity-Induced Bone Loss: Will it Limit Human Space Exploration? Michael Holick, pp. 1569-70; and Effects of Long-Term Exposure on Cancellous and Cortical Weight-Bearing Bones of Cosmonauts, Laurence Vico et al, pp. 1607-11, The Lancet, 6 May, 2000.

Staying Sane in Space, Sara Simpson, Scientific American, Mar. 2000, p. 61-2.

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Want to see the space station from the ground?

The epic Shackleton expedition of 1914 set the standard for hardship -- and survival -- in Antarctica.

International Space Station

More on Mawson and his Antarctic adventures

Read our space-cadet credits.