The project is part of an audacious plan to create hydrogen, which produces no carbon dioxide when burned, and store it in caverns until electricity is needed.
Dozens of items that were found in a cave in southern Spain more than a century ago date from the Mesolithic era and are much older than previously thought, according to a new study.
Mark Dickey, an American, became ill 3,400 feet underground in a cave in Turkey. International crews have gathered to help, but it will take time to carry him out.