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Tidal Forces Could Squeeze Out Planetary Water
Alien planets might experience tidal forces powerful enough to remove all their water, leaving behind hot, dry worlds like Venus.
To Land on a Comet
In 2014, the European Rosetta spacecraft will enter orbit around a comet and land a probe on its surface. Rosetta will have a front-row seat as the comet swings closer to the Sun and is affected by th
Augmented Reality for Astronauts
A new augmented reality unit could help astronauts diagnose medical problems or even perform surgery.
Evidence for Mars Ocean 3 Billion Years Ago
Mars Express has detected sediments on Mars that are reminiscent of an ocean floor. The low-density materials are found in the planet s northern plains, and are a strongly suggest that an ocean was on
Coaxing a Shy Microbe to Stand Out in a Crowd
Scientists have developed a new method to map the genome of single marine microorganisms, even from samples containing millions of individuals from dozens of different groups.
High Planetary Tilt Lowers Odds for Life?
Highly-tilted worlds would have extreme seasons, subjecting life to alternating periods of scorching and subzero temperatures. This could make the development of all but hardiest, simplest creatures a
Mars Drought Makes Life Unlikely
Mars may have been arid for more than 600 million years, making it too hostile for any life to survive on the planet s surface.
Defining the Structure of Exoplanets
Scientists have developed new formulas for determining the materials that compose extrasolar planets.
The P-T Extinction was a Slow Death
New research shows that mass extinctions need not be sudden events. The deadliest extinction known in Earth s history may have killed in stages.
IBEX Glimpses Alien Interstellar Material
NASA s IBEX spacecraft has successfully measured neutral atoms that originate from beyond the heliosheath.

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