Skydiving from the edge of space: can a human break the sound barrier?
Jose Maria Perez Sastre2010-10-01T06:00:00+02:00A person freefalling from 120,000 feet would theoretically reach a supersonic speed of over 700mph. Two daredevils of the skies are racing to break the sound barrier – and face unknown hazards in their attempt. They are Felix Baumgartner (is [...]