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Astrobiology

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Curiosity rover

TURN, TURN, TURN  Curiosity took this selfie on Mars in February. The rover has found what appears to be a seasonal cycle of methane in the Martian atmosphere and more signs of organic molecules in the soil.

Europa

HIDDEN DEPTHS  Evidence is growing that plumes of water erupt through the icy surface of Jupiter’s moon Europa, seen in this composite image taken by the Galileo spacecraft in the late 1990s.

laser and exoplanet

UNDER PRESSURE  Using lasers, scientists compressed iron to high pressures that are likely found in large, rocky exoplanets’ cores. Here, an image of inside the laser chamber is shown with an artist’s rendering of an exoplanet.

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