Geological Timekeepers: The 50-Year Search for Earth’s Oldest Rocks
Half a century ago, scientists believed they had discovered the world’s oldest rocks in the frozen expanses of Greenland, dating back a staggering 3.7 billion years. Today, with additional research and newer methods, their gaze has shifted and expanded. Greenland to Antarctica: An Ancient Discovery First reported in the July 21, 1973 issue of Science […]