Some recent work by E. Fermi and L. Szilard, which has been communicated to me in manuscript, leads me to expect that the element uranium may be turned into a new and important source of energy in the immediate future. Certain aspects of the situation seem to call for watchfulness and, if necessary, quick action on the part of the Administration...

A three standard deviation is a statistical fluctuation; a five standard deviation effect is a miracle. Quoted by Owen Chamberlain.

He was simply unable to let things be foggy. Since they always are, this kept him pretty active.

Whatever nature has in store for mankind, unpleasant as it may be, men must accept, for ignorance is never better than knowledge.

There is just no sensible, logical reason why we would not make use of stem cell research.

We cannot have tomorrow's miracles if we tie scientists' hands with yesterday's rules.

There is not the slightest indication that [nuclear energy] will ever be obtainable. It would mean that the atom would have to be shattered at will.