"At first all was well. In fact, all was terrific. The Takers were pedaling away and the wings of their craft were flapping beautifully. They felt wonderful, exhilarated. They were experiencing the freedom of the air: freedom from restraints that bind and limit the rest of the biological community. And with that freedom came marvels--all the things you mentioned the other day: urbanization, technology, literacy, mathematics, science. "Their flight could never end, it could only go on becoming more and more exciting. They couldn't know, couldn't even have guessed that, like our hapless airman, they were in the air but not in flight. They were in free fall, because their craft was simply not in compliance with the law that makes flight possible. But their disillusionment is far away in the future, and so they're pedaling away and having a wonderful time. Like our airman, they see strange sights in the course of their fall. They see the remains of craft very like their own--not destroyed, merely abandoned--by the Maya, by the Hohokam, by the Anasazi, by the peoples of the Hopewell cult, to mention only a few of those found here in the New World. 'Why,' they wonder, 'are these craft on the ground instead of in the air? Why would any people prefer to be earthbound when they could have the freedom of the air, as we do?' It's beyond comprehension, an unfathomable mystery."