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Hot Topic
Solar System
Earth
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Early Earth May Have Been Prone to Deep Freezes
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| Topic: Earth |
12/07/11 |
| A circulation model of Earth's climate some 2.8 billion years ago indicates that the planet may have been more prone to catastrophic glaciation than previously believed. |
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Earth Flips Magnetic Poles All the Time
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| Topic: Earth |
12/03/11 |
| Earth's magnetic field has flipped its polarity many times throughout history. Based on geologic and fossil records, it seems that such a polarity reversal would have no dramatic effects for life on Earth. |
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Earth's Core Deprived of Oxygen
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| Topic: Earth |
11/27/11 |
| Scientists know that the liquid outer core of the Earth consists mostly of iron, but the other elements present remain unknown. New research shows that oxygen is not present in the outer core. |
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Supervolcanoes Not a 2012 Threat
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| Topic: Earth |
11/19/11 |
| Earth's geological record holds clues about supervolcano eruptions that may have had profound effects on the evolution of life. However, there is no evidence that such a supereruption is imminent. |
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A New 3D Map of Earth
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| Topic: Earth |
10/19/11 |
| Measurements from NASA's Terra spacecraft have been used to improve the most complete digital topographic map of Earth. |
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Earth's Trapped Gas Fed the Early Atmosphere
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| Topic: Earth |
09/27/11 |
| A new study demonstrates how salty water and gases transfer from the atmosphere into the Earth's interior. The research provides new insight into the evolution of our planet. Studying the physical processes of Earth can help astrobiologists understand what makes a planet habitable. |
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Diamonds Illuminate Earth's Deep Mantle
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| Topic: Earth |
09/19/11 |
| New research shows that oceanic crust can make its way right down to the lower mantle (deeper than 660km) and then be transported back to the surface. |
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