The significant chemicals of living tissue are rickety and unstable, which is exactly what is needed for life.

The world of A.D. 2014 will have few routine jobs that cannot be done better by some machine than by any human being. Mankind will therefore have become largely a race of machine tenders.

We're forever teetering on the brink of the unknowable, and trying to understand what can't be understood.

A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.

Scientific apparatus offers a window to knowledge, but as they grow more elaborate, scientists spend ever more time washing the windows.

There are no happy endings in history, only crisis points that pass.

You don't have to be able to lay eggs to know when one of them is rotten.