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Off-Kilter Europa
Topic: Europa
Summary: By carefully studying the cracked surface of Europa, scientists have determined that the moon once spun around a tilted axis.

Deep Impact Mission Comes to an End
Topic: Missions
Summary: NASA has announced the end of operations for Deep Impact after attempts to regain contact with the spacecraft failed.

Comet Impacts Create Ingredients of Life
Topic: Meteorites, Comets and Asteroids
Summary: Scientists have created a number of amino acids by shock compressing an icy mixture similar to the materials found in comets. The study supports the idea that life's building blocks could have come to Earth from space.

The Birth of Earth's Continents
Topic: Geology
Summary: Scientists have proposed a new theory for how the contents of Earth formed as a by-product of mountain-building.

Curiosity Finds No Methane on Mars
Topic: Mars
Summary: Surprising findings from the Curiosity rover on Mars indicate that there is very little methane on the red planet.

Changes in Titan's Surface Brightness Point to Cryovolcanism
Topic: Titan
Summary: Over a period of four years, NASA's Cassini spacecraft has witnessed changes in the brightness of Titan's surface. The observations may be evidence that cryovolcanism is active on the moon of Saturn.

Earth's Wobble Fixes Dinner for Marine Organisms
Topic: Spaceship Earth
Summary: A new study shows that the production of nutrients essential to ocean health on Earth is tied to the cyclic wobbling of our planet on its axis.

Mechanical Gears Seen for the First Time in Nature
Topic: Origin & Evolution of Life
Summary: A natural example of a functioning gear mechanism has been discovered in a common insect.

Challenging Assumptions About the Origin of Life
Topic: Origin & Evolution of Life
Summary: Scientists have proposed a new view on the origin of life on Earth. The study indicates that the 'RNA World' may have had a little help from proteins known as peptides.

Methane's Secrets, From Diamonds to Neptune
Topic: Geology
Summary: A new study is helping scientists better-understand the behavior of methane deep inside planetary interiors.

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