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A Protein for Photosynthesis in Ancient Microorganisms
Topic: Extreme Life
Summary: Scientists have discovered that a protein used in photosynthesis in plants likely developed in microorganisms on ancient Earth - long before oxygen became availalbe in the atmosphere.

Calculated Risks: How Radiation Rules Mars Exploration
Topic: Moon to Mars
Summary: Scientists have calculated the radiation risk of a trip to Mars. The finding use data provided by NASA's Curiosity rover, and highlight the risks that future human explorers might face.

A Look Back and Ahead at Greenland's Changing Climate
Topic: Climate
Summary: A new study describes the mechanisms causing the melting of the Greenland Ice Sheet. The so-called "submarine melting" has increased as the ocean and atmosphere have warmed over the past two decades.

NASA Mars Orbiters See Clues to Possible Water Flows
Topic: Mars
Summary: New images are providing the strongest evidence so far that liquid water may exist on Mars today. The findings could have implications in understanding the potential for life on the red planet.

From Primitive Artificial Cell to Complex Biological Materials
Topic: Origin & Evolution of Life
Summary: Scientists have made steps toward creating artificial 'building blocks' that are capable of self assembling into biological materials.

Kepler Finds a Very Wobbly Planet
Topic: New Planets
Summary: The Kepler telescope has spotted a planet that spins wildly on its axis, tilting up to 30 degrees over 11 years.

A 'Snow Globe' Solar System
Topic: Cosmic Evolution
Summary: A new study on asteroid diversity is providing clues about the tumultuous past of the Solar System.

Tree Roots in the Mountains 'Act Like Thermostat for Global Climate'
Topic: Climate
Summary: For the first time, scientists have discovered how tree roots in the mountains may play an important role in controlling long-term global temperatures.

Fires in the Sky: MAVEN Satellite Looks for Mars' Missing Atmosphere
Topic: Mars
Summary: MAVEN will examine particles in Mars' atmosphere to tell story of the planet's four billion year old past.

Mass Extinction May Not Cause All Organisms to 'Shrink'
Topic: Biosphere
Summary: A new study suggests that the sizes of organisms following mass extinction events may vary more than previously thought.

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