When a politician uses the word 'folks,' we should brace ourselves for the deceit, or worse, that is coming.

If a child from an Amazonian hunter-gatherer tribe comes to Boston, is raised in Boston, that child will be indistinguishable in language capacities from my children growing up here, and vice versa.

Growing up in the place I did I never was aware of any other option but to question everything.

I don't join the New Atheists. So, for example, I wouldn't have the arrogance to lecture some mother who hopes to see her dying child in Heaven - that's none of my business, ultimately. I won't lecture her on the philosophy of science.

A permanent base on Mars would have a number of advantages beyond being a bonanza for planetary science and geology. If, as some evidence suggests, exotic micro-organisms have arisen independently of terrestrial life, studying them could revolutionise biology, medicine and biotechnology.

The city of Tehran is a very modern metropolis, and there's an emphasis in the Islamic republic on science and advancement and technology.

Congress often covers the exposed crotch of our human spaceflight program with the figleaf of science when it's an obvious lie to justify the pumping of billions of dollars into the belly of an ever-voracious aerospace industrial complex. And yes, of course space is dangerous.

I understand that space travel and expansion is just as much about altering ourselves, our attitudes, our social structures, our very biology, as it is about altering the places we choose to live.