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  1. Earth

    Carcinogens from car exhaust can linger

    Free radicals similar to those in cigarette smoke may form when car exhaust cools off, and may persist indefinitely in the air.

    By Davide Castelvecchi
  2. Astronomy

    Preserving digital data for the future of eScience

    From the August 30, 2008 issue of Science News.

    By Alex Szalay
  3. Space

    Tiny object points to remote solar system reservoir

    Possible comet may be distant visitor from the innermost region of the Oort Cloud, the proposed comet reservoir of the outermost solar system.

    By Ron Cowen
  4. Health & Medicine

    Immune cells show long-term memory

    Survivors of the 1918 Spanish flu pandemic still make antibodies against the virus, revealing a long-lived immunity previously thought impossible.