| http://www.w3.org/ns/prov#value | - And the human body isn???t designed for supersonic speeds. ???Our biggest concern is that we don???t know how a human unencumbered by aircraft is going to transition through this,??? said the project???s Medical Director Dr. Jonathan Clark, a flight surgeon for six space shuttle missions (and husband of astronaut Laurel Clark who died in the Columbia disaster in 2003), who has researched numerous
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