Earth's Systems

  1. Earth

    Explainer: How is water cleaned up for drinking

    Unless you’re drinking well water, city folks typically get drinking water that has been treated in a water-treatment plant. Here’s what that means.

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  2. Climate

    Explainer: The furious eye(wall) of a hurricane or typhoon

    The eyewall is the most intense part of a hurricane. Here’s what drives its fury.

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  3. Earth

    Explainer: Where fossil fuels come from

    Despite one oil company famously using an Apatosaurus as its logo, oil, gas and coal don’t come from dinosaurs. They do, however, come from a long time ago.

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  4. Chemistry

    Explainer: CO2 and other greenhouse gases

    Carbon dioxide is just one of several chemicals that contribute to the greenhouse effect. Nitrous oxide, methane and CFCs are other big contributors.

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  5. Planets

    Asteroids may have delivered water to early Earth

    Scientists shot mineral pellets at a simulated planet. It showed an impact wouldn’t have boiled off all of an asteroid’s water.

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    Earth

    How long will Kilauea’s new eruption last?

    A government volcano expert answers burning questions about the ongoing Kilauea eruption.

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  7. Climate

    Analyze This: Climate change could make food less healthy

    Levels of important nutrients are lower in crops exposed to high levels of carbon dioxide, a greenhouse gas. How high? Try levels expected to be typical 30 years from now.

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  8. Physics

    Explainer: What is thundersnow?

    Wacky weather produced lots of thundersnow during New England’s recent winter storms. Some scientists now suspect Mother Nature got some human help.

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  9. Physics

    Explainer: Winds and where they come from

    Temperature and pressure are critical factors affecting why the wind blows where it does. Understanding the nature of wind can teach us a lot about weather.

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  10. Science & Society

    Explainer: Weather and weather prediction

    The sun and Earth combine to create the planet’s weather systems. And science is getting good at predicting what they’ll do.

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  11. Physics

    Disabilities don’t stop these experts in science and tech

    People with disabilities are as varied as the careers some of them pursue in science, technology, engineering and math.

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  12. Earth

    Explainer: Hurricanes, cyclones and typhoons

    Hurricanes are some of the most destructive forces on the planet. Here’s how they form and why they are so dangerous.

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