"Physics, as we know it, will be over in six months." -- Max Born, 1928
"Flight by machines heavier than air is impractical and insignificant, if
not utterly impossible."
-- Simon Newcomb, Director, U.S. Naval Observatory, 1902
"Aerial flight is one of that class of problems with which man will never
be able to cope."
-- Simon Newcomb, 1903
"The popular mind often pictures gigantic flying machines speeding across
the Atlantic carrying innumerable passengers in a way analogous to our
modern steam ships. . . it seems safe to say that such ideas are wholly
visionary and even if the machine could get across with one or two
passengers the expense would be prohibitive to any but the capitalist who
could use his own yacht."
-- William Henry Pickering, Astronomer, 1910
"A popular fantasy is to suppose that flying machines could be used to drop dynamite on the enemy in time of war."
-- William H. Pickering, Director, Harvard College Observatory, 1908
"Airplanes are interesting toys but of no military value."
-- Marechal Ferdinand Foch, Professor of Strategy, Ecole Superieure de Guerre
"Landing and moving about on the moon offers so many serious problems for human beings that it may take science another 200 years to lick them."
-- Science Digest, 1948
"The aeroplane is the invention of the devil and will never play any part in such a serious business as the defence of a nation."
-- Sir Sam Hughes, Canadian Minister of Defence, 1914
More good quotes on technology that failed: http://zimmer.csufresno.edu/~fringwal/stoopid.lis