It often turns out on closer inspection that acts of apparent altruism are really selfishness in disguise.

I am passionate about truth and passionate about clarity, and I don't regard myself as particularly militant or aggressive. I simply wish to discuss what is true and to listen to evidence and put evidence forward to other people and have a sensible, sane, moderated argument.

If the history-deniers who doubt the fact of evolution are ignorant of biology, those who think the world began less than ten thousand years ago are worst than ignorant, they are the deluded to the point of perversity.

Evolution is as much a fact as the heat of the sun.

The less you think, the more you believe.

There is enough information capacity in a single human cell to store the Encyclopedia Britannica, all 30 volumes of it, three or four times over.

Suppose that there's a gene that makes you gay if you were bottle-fed but that has some completely different effect if you were breast-fed. So in the days before bottles were invented that gene would not have manifested itself as gay behavior, but now that bottles are common it can do so.