Transcription: Professor Schoenberg, welcome back to our show. In 1997, there was quite a bit of concern about the sending of manned missions to Mars. We'd known for some time that long stays in zero-gravity conditions had important physiological effects on astronauts, particularly through exposure to rays from solar eruptions. Yes, in weightlessness, the crew suffer from a progressive loss of bone calcium. Furthermore, this calcium loss can result in rather serious kidney stones. Not to mention that space travel also seems to provoke personality disorders. Remember how the cosmonaut Vladimir Vasutin seemed ...
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