In my several visits to Germany, I have written in admiration of that country's strenuous efforts to face its past and make amends.

Trump is in the White House, fulminating on Twitter, messing up foreign policy, mistaking critics for enemies, refusing to immediately and unequivocally condemn neo-Nazis, racists, and other assorted goons - and, in general, failing to provide the nation with a scintilla of moral leadership. This will last until it can't any longer.

Pence is the very personification of the career politician. With the exception of a few years doing talk radio and television shows, he has done nothing but run for office, winning all but the first two times.

Trump's overriding accomplishment is plain: The Republican Party can no longer be shamed.

It is funny that men who are supposed to be scientific cannot get themselves to realise the basic principle of physics, that action and reaction are equal and opposite, that when you persecute people you always rouse them to be strong and stronger.

Science is a part of culture. Indeed, it is the only truly global culture because protons and proteins are the same all over the world, and it's the one culture we can all share.

Distinguishing the signal from the noise requires both scientific knowledge and self-knowledge.

Science fiction and fantasy is a kind of literature that embodies the highest aspirations of the human race.