Geologists visited the Kilauea volcano crater in Hawaii to collect lava samples. Officials from the United States Geological ...

Take a road trip through Nevada to this moon-like crater used by NASA astronauts as a training ground to prepare them for the ...

Now, millions of visitors each year come to see its dramatic scenery of whitewashed houses and blue-domed churches clinging to the cliff along the flooded caldera, or volcanic crater. Last week ...

A truly remarkable quirk of the natural world - this volcano lights up the night sky in an iridescent blue when its sulphuric ...

Now, millions of visitors each year come to see its dramatic scenery of whitewashed houses and blue-domed churches clinging to the cliff along the flooded caldera, or volcanic crater. Last week, ...

Now, millions of visitors each year come to see its dramatic scenery of whitewashed houses and blue-domed churches clinging to the cliff along the flooded caldera, or volcanic crater. Last week ...