A mapping expedition in the Tlayócoc cave in Mexico led a professional cave explorer to a hidden chamber containing shocking ...

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

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 ...