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Swinging Between Ice Ages
Topic: Earth
Summary: Using computer simulations, scientists have demonstrated that the ice-age/warm-period cycle on Earth depends heavily on the alternating influence of continental ice sheets and climate.

Carbon Under Pressure Exhibits New Traits
Topic: Earth
Summary: A new technique is allowing scientists study samples that are heated and squeezed within an electron microscope. Researchers have used the method to reveal new clues about how and where carbon is located within Earth's interior.

The Harmony of Volcanoes
Topic: Earth
Summary: A new study is helping scientists understand the connections between small earthquakes and volcanic eruptions.

Earth's Origins and a 'Hidden Flux'
Topic: Earth
Summary: Research points to large reservoirs of material deep in the mantle that may help to explain Earth's origins.

Research Reveals Earth's Core Affects Length of Day
Topic: Earth
Summary: New research has revealed that processes in the Earth's core are responsible for variations in the length of day on our planet.

How Early Earth Was Warm Enough For Life
Topic: Earth
Summary: A new study is helping astrobiologists understand how early Earth was warm enough for life more than 3 billion years ago, even though the Sun was 20 percent dimmer than today.

How Stable is Earth's System?
Topic: Earth
Summary: The Earth system includes intricate interactions between everything from our planet's dynamic climate to geological and biological processes. A new study is helping astrobiolgists understand just how stable the Earth system is.

Ancient Trapped Water Explains Earth's First Ice Age
Topic: Earth
Summary: Scientists have discovered tiny bubbles of water found in quartz grains in Australia. The bubbles may hold the key to understanding what caused the Earth's first ice age.

Key to Mass Extinctions Could be Future Food and Fuel
Topic: Earth
Summary: A potential culprit in several of the largest extinctions in Earth's history might also benefit the future of life on Earth. A new study indicates that low doses of 'sewer gas' could enhance plant growth for food and biofuel production.

NASA Mission Will Track Earth's Ozone
Topic: Earth
Summary: Life as we know it on Earth would not be possible without the fragile layer of ozone 25 km above our planet's surface. NASA is now preparing to launch the most sophisticated space-based ozone sensor ever.

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