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  1. 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) […]

    By Science News
  2. Earth

    Contrails forecast on the horizon

    Studies of the contrails generated by jets flying high over Alaska may lead to improved techniques for predicting the formation of the artificial clouds, which some scientists suggest have a warming effect on Earth's climate.

    By Sid Perkins
  3. Earth

    Warm arctic summer melted much ice

    Satellite observations of the Arctic Ocean show that the amount of sea ice there this year was the lowest it's been in more than 20 years.