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  1. Earth

    Contraceptive ring could pose risks after its disposal

    Discarded vaginal contraceptive rings could interfere with fishes' reproduction by releasing estrogen into streams.

    By Janet Raloff
  2. Earth

    Snow alga may be sizable carbon sink

    A common microorganism that adds a reddish tinge to some patches of snow may be a significant consumer of planet-warming carbon dioxide.

    By Sid Perkins

  3. 19160

    I found the “stats” about blood donors and patients in this article misleading, with the implication that 8 million volunteer donors are more than enough for 4.5 million patients. A comparison of how many people donate blood during their lives and how many people need blood donations during theirs might have been more informative.