Krypton was bothersome to Superman but is beneficial to scientists. A commonly used method of calculating ancient ice age better understands Earth’s climate and past ice ages. For years, carbon dating compared the decay of a radioactive isotope to that of a stable isotope. Carbon -14 is produced by cosmic rays in the ice, providing dating to 50,000 years. The accuracy has been compromised and radiometric Krypton dating has provided promising results. Scientists believe they may soon be able to date ice much older than ever before possibly back 1.5 million years. Krypton atoms are scarce and researchers placed two 750-pound hunks of melting glacier ice into a vacuum chamber. Krypton is stored in air bubbles with hopes of further success.