Well that link is pure nonsense. Who cares about the slant angle of aircraft trajectories? What possible use does that hold for anyone? ...But I have to confess, I have not heard of this guy and it appears I should have, if he came up with "Mathematica" and was a valued contemporary of Richard Feynman the legendary particle physicist. Makes me think of other gifted persons who became wholly distracted. Not as rare an occurrence as one would think.