If there be only hours, at least learn what there is time to learn.

But every time our ability to access information and to communicate it to others is improved, in some sense we have achieved an increase over natural intelligence.

When I began writing science fiction in the middle 60s, it seemed very easy to find ideas that took decades to percolate into the cultural consciousness; now the lead time seems more like eighteen months.

Peregrine Wickwrackscar was flying. A pilgrim with legends that went back almost a thousand years-and not one of them could come near to this!

I argue in this paper that we are on the edge of change comparable to the rise of human life on Earth.

Sometimes the biggest disasters aren't noticed at all – no one's around to write horror stories.

Even the largest avalanche is triggered by small things.