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  1. Earth

    How Green Are Your Travels?

    This website offers a rough gauge of the carbon-dioxide emissions associated with flying around the country. Just plug in a starting point and destination and it gives you a round-trip estimate of the greenhouse-gas “footprint” of your travel. The goal is to encourage visitors to buy carbon-offsets to cover the greenhouse-gas cost of their treks. […]

    By Science News
  2. Earth

    Laser printers can dirty the air

    Some laser printers emit substantial amounts of potentially hazardous nanoscale particles.

    By Janet Raloff
  3. Health & Medicine

    Aura origins show the way in epilepsy surgery

    Epilepsy patients who experience multiple auras before a seizure, usually considered poor candidates for corrective brain surgery, might benefit from by a new brain scan procedure.