One of the best ways to assemble the puzzle pieces of Earth’s past is hiding deep beneath its white polar sheets: ice cores. These frozen time capsules preserve air bubbles from thousands of years ago ...
By Alkira Reinfrank, Junko Ogura and Will Ripley, CNN Ise-Shima, Japan (CNN) — Aiko Ohno dives down in the cool waters off Japan’s Ise-Shima National Park, scanning the rocky seabed for urchins and ...