News

  1. Chemistry

    Money Allergies: Two-toned euro coins shed metallic allergen

    The two-alloy composition of some euro coins makes them release large amounts of nickel, a common skin allergen.

    By Jessica Gorman
  2. Archaeology

    Could the Anasazi have stayed?

    New computer simulations of the changing environmental conditions around one of the Anasazi cultural centers in the first part of the last millennium suggest that drought wasn't the only factor behind a sudden collapse of the civilization.

    By Sid Perkins
  3. Earth

    Chinese records show typhoon cycles

    Historical records compiled by local governments along China's southeastern coast during the past 1,000 years suggest that there's a 50-year cycle in the annual number of typhoons that strike the area.