Earth

  1. Climate

    Carbon dioxide in atmosphere reaches landmark level

    At 400 parts per million, greenhouse gas concentration is now higher than it has been for millions of years.

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  2. Earth

    Japan’s 2011 earthquake upped Tokyo’s risk

    Chance more than doubled that capital city will soon experience big temblor, researchers calculate.

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  3. Earth

    The Arctic was once warmer, covered by trees

    Pliocene epoch featured greenhouse gas levels similar to today's but with higher average temperatures.

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  4. Climate

    Ice loss from Greenland’s glaciers may level off

    Simulation suggests long-term effect on sea level not as dire as some predictions.

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  5. Earth

    Toxic waste sites may cause health problems for millions

    Exposures to lead and chromium represent particular problems, study finds in India, Indonesia and Philippines.

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  6. Earth

    The ice keeper

    The Science Life.

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  7. Earth

    Spinning the Core

    Laboratory dynamos attempt to generate magnetic fields the way planets and stars do.

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  8. Life

    So far, the great tit has coped with climate change

    Earlier arrival of birds’ food due to warming temperatures hasn’t yet reduced bird population.

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  9. Earth

    Early Earth’s chlorine blown away by giant impacts

    Low levels of chlorine on planet's surface have long puzzled scientists.

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  10. Earth

    Remnants of Earth’s crust survive in the planet’s interior

    A slab stayed unperturbed in the mantle for billions of years before resurfacing, sulfur measurements suggest.

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  11. Earth

    Yangtze’s age revealed

    Geologists narrow window on time of the Chinese river’s origin to 23-36 million years ago.

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  12. Earth

    Magnitude 7.8 earthquake hits Iran

    Casualties reported in nearby Pakistan from temblor.

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