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A comment on SpaceX Grasshopper Flies High. Parent comment

Re:SpaceX Grasshopper Flies High by mikeash on Tuesday April 23, 2013 @12:21PM (#5596072)
That's a good one, although a 747 gets its oxygen for free.
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Re:SpaceX Grasshopper Flies High by schiffern on Tuesday April 23, 2013 @04:21PM (#5597710)
LOX is literally cheaper than dirt (8¢/lb, or 67¢/gallon).
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Re:SpaceX Grasshopper Flies High by DavidSJ on Tuesday April 23, 2013 @04:18PM (#5597687)
Yes, but oxygen's pretty easy to come by it turns out.
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