Researchers have found a "unique" collection of "cave pearls"—some of which contain archaeological artifacts—in an ancient tunnel, a study has reported. Cave pearls are a type of "speleothem"—a term ...
Deep inside a massive cave plunging more than 500 feet below the surface, explorers made an unexpected discovery. Ancient ...
Earth not only does not support diverse ecosystems, but it also has places that serve as analogs for other celestial worlds in our solar system. Astrobiologist Joshua Sebree of the University of ...