"These are the great ancient temples of Karnak, on the edge of the Nile about 450 miles south of Cairo. They were the …"

"The Egyptians built an empire and ran it with a handful of technology... the wheel, irrigation canals, the loom, the …"

"Karnak was the first great statement of what technology could do with unlimited manpower and the approval of the gods…"

"You see how increasingly the only way we in the advanced industrial nations, with our bewildering technology network,…"

"An invention acts rather like a trigger, because, once it's there, it changes the way things are, and that change sti…"

"Following the trail of events from some point in the past to a piece of modern technology is rather like a detective …"

"… That's all it takes to get you back to the late 18th century. Three grandfather's lifetimes. That's how close we ar…"

"I would say it was a pretty safe bet, that the one magic wish most people would like to be granted would be to be abl…"

"Today, the nuclear bomb is like a Sword of Damocles hanging over us. Will it fall again?"

"… Any one of a million things could fail and cause our complex civilization to collapse for an hour, for a day, or ho…"