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space missions
man in space
environment and energy
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environmental issues
energy
transportation
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Archived July 25, 2007
July 25, 2007
Expect damage in a devastating earthquake
Ben-Gurion University
July 25, 2007
5 תגובות
A mysterious disc
You found Simon
July 25, 2007
5 תגובות
The astronauts threw ammonia into space
Avi Blizovsky
July 25, 2007
4 תגובות
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