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| In Search of Virus Fossils |
| Topic: Origin & Evolution of Life |
10/17/11 |
| Have viruses been around since life first appeared on Earth? To learn about the history of viruses, scientists are exploring whether salt beds and hot springs preserve viral signatures. |
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| The Hazy History of Titan´s Air |
| Topic: Titan |
10/13/11 |
| What rocky moon has a nitrogen-rich atmosphere, Earth-like weather patterns and geology, liquid hydrocarbon seas and a relatively good chance to support life? The answer is Titan, the fascinating moon of Saturn. |
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| Mission to Mysterious Uranus |
| Topic: Outer Solar System |
10/10/11 |
| Scientists want to send an orbiter and probe to the ice giant planet Uranus, but do the resources exist to support such an ambitious project? |
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| The Public Debate on Climate Change |
| Topic: Climate |
10/03/11 |
| Even after years of scientific research that points to how human activity is causing climate change, pundits, policymakers and the general public are still debating the issue. |
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| Heavy Metal Stars Produce Earth-Like Planets |
| Topic: Cosmic Evolution |
09/29/11 |
| Examining the wealth of data from Kepler, astronomers have seen a positive correlation between stellar composition and planetary formation, a correlation that could affect how we search for life in the universe. |
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| Living in the Galactic Danger Zone |
| Topic: Alien Life |
09/22/11 |
| Although stars closer to the galactic center are exposed to more radiation, new research finds that there are more chances to find habitable planets there than in the outer regions of our galaxy. |
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| Methane Debate Splits Mars Community |
| Topic: Mars |
09/12/11 |
| Eight years have passed, and scientists still haven't been able to come to any consensus over purported detections of methane on Mars. |
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| Microbe Risk When Rover Wheels Hit Martian Dirt |
| Topic: Mars |
09/05/11 |
| NASA's Mars Science Laboratory mission will use a new "sky crane" method to lower the SUV-sized rover onto the martian surface. This direct touchdown risks contaminating the Red Planet's surface with Earth microbes hitchhiking on the rover's wheels. |
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