"Scientists have never proven the existence of gravity" Guess this guys stuff floats when he drops something "Two things are infinite: the universe and human stupidity." - Allegedly by Albert Einstein.
"Why at sea level, at 35,000ft, at 120,000ft and still we see no curvature"
There's lots of rubbish on that back sticker, but I think the above sentence may be the most incomprehensible thing that has ever been expressed using the English language...