An curved arrow pointing right. During the planet's hottest year ever, the second-largest lake in Bolivia has "disappeared." Climate change expert Dirk Hoffman told the Associated Press that the ...

This story appears in the March 2018 issue of National Geographic magazine. Tire tracks stretched across the flat lake bed to the horizon. We followed them in a Suzuki 4x4, looking for clues about ...

Some 40,000 years ago, this area was part of a giant lake that dried up, leaving behind two salt flats: Uyuni (not pictured) and Coipasa, visible in gray and light blue in the bottom-left corner.