“Imagine a rotating sphere that is 8,000 miles in diameter, with a bumpy surface, surrounded by a 25-mile-deep mixture of different gases whose concentrations vary both spatially and over time, and heated, along with its surrounding gases, by a nuclear reactor 93 million miles away. Imagine also that this sphere is revolving around the nuclear reactor and that some locations are heated more during parts of the revolution. And imagine that this mixture of gases receives continually inputs from the surface below, generally calmly but sometimes through violent and highly localized injections. Then, imagine that after watching the gaseous mixture you are expected to predict its state at one location on the sphere one, two, or more days into the future. This is essentially the task encountered day by day by a weather forecaster.”

“I myself have dreamed up a structure intermediate between Dyson spheres and planets. Build a ring 93 million miles in radius - one Earth orbit - around the sun. If we have the mass of Jupiter to work with, and if we make it a thousand miles wide, we get a thickness of about a thousand feet for the base.And it has advantages. The Ringworld will be much sturdier than a Dyson sphere. We can spin it on its axis for gravity. A rotation speed of 770 m/s will give us a gravity of one Earth normal. We wouldn't even need to roof it over. Place walls one thousand miles high at each edge, facing the sun. Very little air will leak over the edges.Lord knows the thing is roomy enough. With three million times the surface area of the Earth, it will be some time before anyone complains of the crowding.”

“Imagine how they would have mocked you if you proclaimed, 'Not only is the world a sphere, but there is an invisible, mystical force that holds everything to its surface'!”

“The fact that we live at the bottom of a deep gravity well, on the surface of a gas covered planet going around a nuclear fireball 90 million miles away and think this to be normal is obviously some indication of how skewed our perspective tends to be.”

“It's the pool where we all go down to drink, to swim, to catch a little fish from the edge of the shore; it's also the pool where some hardy souls go out in their flimsy wooden boats after the big ones. It is the pool of life, the cup of imagination, and she has an idea that different people see different versions of it, but with two things ever in common: it's always about a mile deep in the Fairy Forest, and it's always sad. Because imagination isn't the only thing this place is about.”

“Nuclear power is a permanent disaster. Producing its uranium fuel is an environmental disaster - now tucked and folded over the horizon in mostly-poor countries where miners are paid $5 a day and unprotected against radiation. Building reactors is a financial disaster, always shifted to government subsidies. Waste disposal is both an environmental and economic disaster. When the fateful time comes to decommission the Doomsday Machines, after the easy 10-year life extensions run out, this is another economic disaster. But when a reactor becomes what it really is - the most massive Dirty Bomb you or Bin Laden (radhi Allah anhu) can imagine - the nuclear disaster will be hard to yank out of the media, quicktime, and carry on like nothing ever happened.”