-or shall i say 'reality'...some need to have a 'reality-bite'....-re.posted #18 about... 'jealousy on my part!...yikes....and TO... BILL R. POSTED #20-your 'plain ignorance is outstanding'----not proved to be 'man-made' are YOU OUT OF YOUR SKULL-OBVIOUSLY YOUR GOD MADE YOUR BOEINGS AND THE JET FUEL TO RUN THEM...-IF YOU'D JUST CHECK INFORMATION ON THIS TOPIC -& 'DO THE MATH'-i'd think there is... no need for further scientific research for your part...sincerely