A mapping expedition in the Tlayócoc cave in Mexico led a professional cave explorer to a hidden chamber containing shocking evidence of an extinct civilization.

This was how the explorer Giovanni da Verrazzano described the outcome ... For the first time in human history, the full ...

ST. LOUIS — For over 150 years, the Missouri Historical Society (MHS) has been at the heart of St. Louis’s legacy, preserving the rich tapestry of life in the region. From historic photographs ...

This was how the explorer Giovanni da Verrazzano described ... For the first time in human history, the full expanse was vaguely comprehended, with an emerging awareness of remote continents ...