Author: Sid Perkins, ScienceNOW.

  • Why does the Earth's core appear to be so light?

    ‚ÄčThe old tales may be true: There is brimstone in the underworld, and lots of it. Brimstone, the biblical name for sulfur, is often found near hot springs and volcanic fissures on Earth’s surface (above). But scientists studying the formation of Earth’s core have shown that the lightweight nonmetal might also be present there in vast quantities,…