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  1. Math

    Setting Records Randomly

    A wide variety of factors can influence the winning time of a race. For a given event over the course of a year, for example, the results may depend on the quality of the runners, the race location, weather conditions, and so on. In a 1985 article in the Journal of the American Statistical Association, […]

    By Ivars Peterson
  2. Earth

    Corals keep eruption record

    Dust from a giant eruption is lodged within Florida coral.

    By Richard Monastersky
  3. Earth

    Mapping the Frozen Sky: Study looks at clouds from both sides now

    By combining simultaneous observations from satellites and ground-based instruments, scientists can generate a three-dimensional map of the size and distribution of ice particles in a cirrus cloud.