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Igor Siwanowicz
Cosmic Log
It's a trap! Micro monster takes Olympus BioScapes photo prize
DigitalGlobe
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Holiday calendar: Snaky Colorado River tricks the eye
NASA
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Holiday calendar: A space farewell to Nelson Mandela
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NASA / GSFC
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Holiday calendar: Happy St. Lucy's Day, from space
Kerbal Space Program via YouTube
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One giant leap for Kerbalkind: Spaceflight sim wins geek gift award
Bill Ingalls / NASA file
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SpaceX wins NASA's nod to take over historic Launch Pad 39A
NASA via NBC News
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Space station's coolant problem casts a cloud over cargo craft's launch
DigitalGlobe
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Holiday calendar: The Island of Love needs healing
NASA
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Bezos' Blue Origin space venture loses protest over NASA's launch pad
Virgin Galactic
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Virgin Galactic's SpaceShipTwo shows off its shine in gliding test
Mike Hopkins / NASA
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Holiday calendar: A fractal puzzle, seen from space
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NASA file
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Space station's coolant system crippled, but crew stays safe
NASA / JPL-Caltech
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NASA's Juno video shows a starship's view of Earth and the moon
NASA
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Holiday calendar: London and Paris light up the night
Mars One
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Mars One unveils plan for private Red Planet robotic mission in 2018
Lyle Buss / University of Florida
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A winter-proof cockroach!? It's just New York's latest invader
NASA / JPL-Caltech / MSSS
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Martian microbes? Ancient lake could have held life, rover team says
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World View Enterprises
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Astronaut Mark Kelly joins World View's near-space balloon team
ESA / BELSPO
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Holiday calendar: Mount Etna makes its mark on Sicily
DigitalGlobe
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Holiday calendar: Staring down at Mount Vesuvius
Brad Goldpaint
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Stunning after sunset: Venus has its brightest night of the year
Mike Hopkins / NASA
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Holiday calendar: Grand Canyon, seen and unseen
Cake in the Morn / Etsy
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Geek gift guide: Add a scientific twist to your holiday list
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Chris Hadfield via NASA / Twitter
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Holiday calendar: NASA pays tribute to Nelson Mandela
NBC News
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How whales lose their way: Toxins, tides and other troubles
NASA / JPL-Caltech / SSI
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It's the Great Hexagon! Storm system shines in Saturn pictures
Mike Hopkins / NASA
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Holiday calendar: Twin volcanoes act up in the Pacific
Matevz Tadel / UCSD / CMS
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What's dark matter? Find out about the new frontiers of physics
Javier Trueba / Madrid Scientific Films
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400,000-year-old human DNA adds new tangle to our origin story
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DigitalGlobe
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Holiday calendar: Syria's medieval marvel marred
SpaceX
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Third time's the charm: SpaceX launches big commercial satellite
Wolf Science Center
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Wolves can also be man's best friend, scientists say
NASA
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Jeff Bezos' Blue Origin space venture touts its new rocket engine
Stephan Lautenschlager / Univ. of Bristol
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Why did some dinosaurs have beaks? All the better to eat food with
CNES / Astrium / SPOT / Abrams
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Holiday calendar: Where the rain in Spain goes
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AP
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'Angel of 9/11': Steel visage tricks the eye — and touches the heart
ISRO via Facebook
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Holiday calendar: Farewell, Earth ... Hello, Mars!
NASA / ESA / SOHO
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Comet ISON's leftovers fade away, right before a satellite's eyes
Jessica Stewart / St. Joseph News-Press via AP
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Endangered Species Act turns 40 years old — and faces midlife crisis
NBC News
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Holiday gift guide: Science books for all sorts of tables (plus tablets)
NASA / ESA / SOHO
Cosmic Log
Only mostly dead: Astronomers puzzle over zombie Comet ISON