1. Mount Pinatubo's caldera on June 22, 1991

    Climate change already accelerating sea level rise, study finds

    Greenhouse gases are already having an accelerating effect on sea level rise, but the impact has so far been masked by the cataclysmic 1991 eruption of Mount Pinatubo in the Philippines.

    • Climate

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  2. The Sun in 1967

    1967 solar storm nearly took U.S. to brink of war

    Military space weather forecasters helped avoid a potential nuclear conflict between the U.S. and Russia when they alerted leaders that a solar storm may have been responsible for jamming radio and radar communications.

    • Sun + Space Weather

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  3. Image of Comet ISON taken by the Hubble

    The comet that disappeared: What happened to ISON?

    A new study sheds light on the mystery of Comet ISON, suggesting that the comet broke up before reaching the Sun.

    • Sun + Space Weather

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  4. Foothills Lab Anthes building in Boulder built by UCAR.

    UCAR maintains A+ long-term credit rating

    Strong credit rating translates into lower costs for UCAR's funders.

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  5. Boosting diversity in Earth system science

    The SOARS program has been boosting diversity in Earth system science for two decades.

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