What the meat industry figured out is that you don't need healthy animals to make a profit. Sick animals are more profitable... Factory farms calculate how close to death they can keep animals without killing them. That's the business model. How quickly they can be made to grow, how tightly they can be packed, how much or how little can they eat, how sick they can get without dying...We live in a world in which it's conventional to treat an animal like a block of wood.

From space, astronauts can see people making love as a tiny speck of light. Not light, exactly, but a glow that could be confused for light - a coital radiance that takes generations to pour like honey through the darkness to the astronaut's eyes. In about one and a half centuries - after the lovers who made the glow will have long since been laid permanently on their backs - the metropolitan cities will be seen from space. They will glow all year. Smaller cities will also be seen, but with great difficulty. Towns will be virtually impossible to spot. Individual couples invisible.

I flipped back through the pad of paper while I thought about what Stephen Hawking would do next.

I felt, that night, on that stage, under that skull, incredibly close to everything in the universe, but also extremely alone. I wondered, for the first time in my life, if life was worth all the work it took to live. What exactly made it worth it? What's so horrible about being dead forever, and not feeling anything, and not even dreaming? What's so great about feeling and dreaming?

Why is taste, the crudest of our senses, exempted from the ethical rules that govern our other senses?

This is the sixty-nine," I told him, presenting the magazine in front of him. I put my fingers -- two of them -- on the action, so that he would not overlook it. "Why is it dubbed sixty-nine?" he asked, because he is a person hot on fire with curiosity. "It was invented in 1969. My friend Gregory knows a friend of the nephew of the inventor." "What did people do before 1969?" "Merely blowjobs and masticating box, but never in chorus.

We know, at least, that this decision (ending factory farming) will help prevent deforestation, curb global warming, reduce pollution, save oil reserves, lessen the burden on rural America, decrease human rights abuses, improve publish health, and help eliminate the most systematic animal abuse in history.