“Personally, I think there is not a scrap of evidence that the process of isotopic separation can be made to produce explosive bombs.”— Francis William Aston
“The battle to feed all of humanity is over. In the 1970s hundreds of millions of people will starve to death in spite of any crash programs embarked upon now.”— Paul R. Ehrlich
“Only six electronic digital computers would be required to satisfy the computing needs of the entire United States.”— Howard Aiken
“The nonbiological intelligence created in that year will be one billion times more powerful than all human intelligence today.”— Ray Kurzweil
“It would appear that we have reached the limits of what it is possible to achieve with computer technology, although one should be careful with such statements, as they tend to sound pretty silly in five years.”— John von Neumann
“Nanotechnology has been moving a little faster than I expected, virtual reality a little slower.”— K. Eric Drexler
“The demonstration that no possible combination of known substances, known forms of machinery and known forms of force can be united in a practical machine by which man shall fly long distances through the air, seems to the writer as complete as it is possible for the demonstration of any physical fact to be.”— Simon Newcomb
“One day, the U.S. will be a great country again. When? When the dollar has collapsed, and the evil empire of the U.S. has disappeared.”— Marc Faber