Exercise invigorates the body and sharpens the mind. - Michael Crichton

These kids were smart, they were enthusiastic, and they were young enough so that the schools hadn’t destroyed all their interest in learning. They could still actually use their brains, which in Thorne’s view was a sure sign they hadn’t yet completed a formal education.

To an outsider, the most significant innovation in the global warming controversy is the overt reliance that is being placed on models. Back in the days of nuclear winter, computer models were invoked to add weight to a conclusion: “These results are derived with the help of a computer model.” But now, large-scale computer models are seen as generating data in themselves. No longer are models judged by how well they reproduce data from the real world—increasingly, models provide the data. As if they were themselves a reality. And indeed they are, when we are projecting forward.

People worry about losing species diversity in the rain forest. But what about intellectual diversity-our most necessary resourse?