“...for the human brain can become the best torture house of all those it has invented, established and used in a millions of years, in millions of lands, on millions of howling creatures.”

“It pains me even now, even a million years later, to write about such human misbehaviour.A million years later, I feel like apologizing for the human race. That’s all I can say.”

“About 3 million pounds of antibiotics are given to humans each year, but a whopping 17.8 million pounds are fed to livestock.”

“(On the energy radiated by the Sun)It's four hundred million million million million watts. That is a million times the power consumption of the United States every year, radiated in one second, and we worked that out by using some water, a thermometer, a tin, and an umbrella. And that's why I love physics.”

“If it takes a million years for a fish to become a reptile, has Man, in our few hundred, altered out of recognition?”

“The first ten million years were the worst," said Marvin, "and the second ten million years, they were the worst too. The third ten million years I didn't enjoy at all. After that I went into a bit of a decline.”