Grand Canyon

  • Inverted clouds virtually obscure Arizona's Grand Canyon. Image from the National Park Service.
    December 11, 2014   BY Lorna Baldwin 

    Imagine showing up for a once-in-a-lifetime chance to view the Grand Canyon in Arizona only to find the deep ravine completely covered by clouds. If you went today, that’s what you saw — a rare total cloud inversion just below the rim. The unusual weather phenomenon usually happens every few years, but this is the second year in a row.
    Continue reading

  • June 24, 2013  

    In other news Monday, the bipartisan immigration bill cleared a major test in the Senate with votes to spare. Senators voted to debate an amendment that calls for $30 billion over 10 years to double border patrol and build 700 miles of fences. Also, flooding in Northern India has now claimed over 1,000 lives. Continue reading

  • November 30, 2012  

    A newly published study renews an old debate about the age of the Grand Canyon, positing a possibility that the geographical formation could be tens of millions of years older than current wisdom suggests, dating back to the time of dinosaurs. Margaret Warner talks to science correspondent Miles O’Brien about its significance. Continue reading