Letters to the Editor

19158

This article reports that 223 out of 243 aircraft in the study produced contrails and that the researchers produced a model that predicts contrails correctly 92 percent of the time (but doesn’t predict their duration). Based on the article, I propose the simplest possible model: Always predict a contrail. You’ll be right 223/243 (92 percent) […]

19198

This article reports that 223 out of 243 aircraft in the study produced contrails and that the researchers produced a model that predicts contrails correctly 92 percent of the time (but doesn’t predict their duration). Based on the article, I propose the simplest possible model: Always predict a contrail. You’ll be right 223/243 (92 percent) […]

19199

In your article, you describe Einstein’s negative reaction to Newton’s proposition that gravity acts instantaneously on two objects.