Subscribe to This Day in History

Discover events in American history – plus the stamps that make them come alive.

Today’s Article

  • December 9, 2025

    Petrified Forest National Park

    On December 9, 1962, Petrified Forest National Park was officially established, upgrading an already protected landscape into a full national park. The designation ensured stronger protection for its fossil-rich badlands, archaeological sites, and striking deposits of petrified wood, and it marked a major milestone in decades of preservation efforts.
    Read More