All of the elements that form our planet were originally forged in cosmic furnaces: all the food we eat and thus our bodies themselves recycle atoms that once know volcanic fire.
The most active--and most visited--volcano on earth is Kilauea in the Hawaii Volcanoes National Park, seen by three million people every year. Along with its counterpart Piton de La Fournaise, on the French island of R?union in the Indian Ocean, it is characterized...