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.

Technology makes the world a new place.

Technology will need to make many more huge leaps before one can ever view films with the level of picture and sound quality many film lovers demand without having to slide a disc into a player, especially with the technical requirements of today's 3D movies.

Social media, for all of its limitations, is rarely irrelevant. The stream of updates on your Facebook page, for instance, is algorithmically engineered to be darn-near irresistible.

Every embarrassing moment is going to be shown on the Internet, whether the candidate likes it or not. The ones that can't deal with that are going to fail.