The question that will decide our destiny is not whether we shall expand into space. It is: shall we be one species or a million? A million species will not exhaust the ecological niches that are awaiting the arrival of intelligence.

It's as great a part of the human adventure to invent things as to understand them. John Randall wasn't a great scientist, but he was a great inventor. There's been lots more like him, and it's a shame they don't get Nobel Prizes.

Many of the technologies that are now racing ahead most rapidly, replacing human workers in factories and offices with machines, making stockholders richer and workers poorer, are indeed tending to accentuate the existing inequalities in the distribution of wealth.

The marketplace judges technologies by their practical effectiveness, by whether they succeed or fail to do the job they are designed to do.

Philanthropy without scale and sustainability is like any other bad business that will simply wither and die on the vine.

New questions can produce new scientific leaps. They can tiddlywink new flips of insight and understanding. Big ones. Paradigm shifts.

No one can deny that Russia fired some big rockets and placed satellites into orbit. But there's been a deluge of poppycock about 'miraculous' scientific advances that enabled them to do it. Much of this analysis reflects ignorance about rocketry.

We may achieve climate, but weather is thrust upon us.