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  1. Moral Sense

    How do humans throughout the world decide what is right and wrong? Harvard researchers have designed a test, which consists of a series of moral dilemmas, to probe the psychological mechanisms underlying ethical judgments. The online test takes only about 10 minutes, and responses are completely confidential. Go to: http://moral.wjh.harvard.edu/index.html

    By Science News
  2. Math

    Goldbach Computations

    In 1742, historian and mathematician Christian Goldbach (1690–1764) wrote a letter to Leonhard Euler (1707–1783) in which he suggested, in effect, that every integer greater than 5 is the sum of three prime numbers. A prime number is evenly divisible only by itself and 1. Nowadays, Goldbach’s conjecture is expressed in the following equivalent form: […]

    By Ivars Peterson
  3. Earth

    Toxic Controversy: Perchlorate found in milk, but risk is debated

    Researchers in Texas have detected the chemical perchlorate in milk, crops, and a significant portion of the state's groundwater.