“It’s a desperate thing, not only because another species is lost and the tragedy of that, but because I don’t know why we keep building these fucking dams,” Adams said in a surprisingly forceful British whisper. “Not only do they cause environmental and social disasters, they, with very few exceptions, all fail to do what they were supposed to do in the first place. Look at the Amazon, where they’ve all silted up. What is the reaction to that? They’re going to build another eighty of them. It’s just balmy. We must have beaver genes or something. . . . There’s just this kind of sensational desire to build dams, and maybe that should be looked at and excised from human nature. Maybe the Human Genome Project can locate the beaver/dam-building gene and cut that out.”

In The Hitchhiker’s Guide to the Galaxy, intergalactic bulldozers destroyed the Earth and humanity. A very different sort of bulldozer destroyed the most successful species the planet had ever known. Sixty-five million years ago, a six-mile-wide asteroid slammed into the Yucatán peninsula, created a one-hundred-mile crater, and sent a cloud of searing vapor and dust into the air. That was pretty much it for the dinosaurs.

“I’m rather obsessed with the idea of that comet coming down and it being the single event to which we owe our very existence,” Adams said. “It is arguably the single most dramatic thing to have ever occurred in the world and certainly the one that was the most dramatic event in our lives, in that it paved the way for our existence, and no one was there to see it.”

Dinosaur-killing rocks are classic physics. The newer physics is a little too outlandish for Adams, a man who wrote that the answer to Life, the Universe and Everything is 42. A computer came up with that answer, and Adams said computers will change everything.

“Now that we’ve built computers, first we made them room-size, then desk-size and in briefcases and in pockets, soon they’ll be as plentiful as dust—you can sprinkle computers all over the place. Gradually, the whole environment will become something far more responsive and smart, and we’ll be living in a way that’s very hard for people living on the planet just now to understand,” Adams said. “I guess my six-year-old daughter will get a much better handle on it.”

Adams has done a bit of everything, from radio to television to designing computer games. Not all of them worked out.

“These are life’s little learning experiences,” he said. “You know what a learning experience is? A learning experience is one of those things that says, ‘You know that thing you just did? Don’t do that.’

“At the end of all this being-determined-to-be-a-jack-of-all-trades, I think I’m better off just sitting down and putting a hundred thousand words in a cunning order.”

Adams writes “slowly and painfully.”