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  1. Physics

    Anatomy of a Lightning Ball

    Metallic fuzz, acid droplets, or other fairy dust may conjure up ball lightning (with video clips).

    By Peter Weiss
  2. Math

    Euler’s Homework

    Even the best and most prolific of mathematicians have had to do homework assignments. Famed Swiss mathematician Leonhard Euler (1707–1783) was no exception. Euler was only 14 years old when he was sent to the University of Basel in 1720 to study for the ministry. Not long after his arrival, he got himself introduced to […]

    By Ivars Peterson
  3. Health & Medicine

    An El Niño link with a tropical disease?

    An analysis of recent outbreaks of an often fatal disease in Peru may strengthen a link between the malady and the warming of the tropical Pacific Ocean known as El Niño.