Experimental confirmation of a prediction is merely a measurement. An experiment disproving a prediction is a discovery.

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

An experiment disproving a prediction is discovery.

[on what characteristics Nobel prize winning physicists had in common] I cannot think of a single one, not even intelligence.

Ignorance is never better than knowledge

The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.

Where is everybody? Humans could theoretically colonize the galaxy in a million years or so, and if they could, astronauts from older civilizations could do the same. So why haven't they come to Earth?