The largest catalog ever published of very high energy gamma ray sources in the galaxy

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Astronomers have published the results of 15 years of gamma ray observations of the Milky Way. Its telescopes installed in Namibia have studied populations of pulsar wind nebulae and supernova remnants, as well as microquasars, never before detected in gamma rays.
via Science Daily
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Water appeared while Earth was still growing

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Cosmo-chemists have performed the largest study to date of oxygen isotopes in lunar rocks, and found a small but measurable difference in the makeup of the moon and Earth. The research proposes that Earth acquired the majority of its water during the main stage of its growth -- which counters a popular theory.
via Science Daily
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ExoMars poised to start science mission

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The ExoMars orbiter will soon begin its search for gases that may be linked to active geological or biological activity on the Red Planet.

via ESA Space Science
http://www.esa.int/Our_Activities/Space_Science/ExoMars/ExoMars_poised_to_start_science_mission

Cloudy Venus

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Space Science Image of the Week: ESA's Venus Express shows our sister planet's atmosphere to be an alien and dynamic place, with unique clouds and behaviour
via ESA Space Science
http://www.esa.int/ESA_Multimedia/Images/2018/04/Cloudy_Venus

Cost effective technique for mass production of high-quality graphene

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Scientists have developed an economical and industrially viable strategy to produce graphene. The new technique addresses the long-standing challenge of an efficient process for large-scale production of graphene, and paves the way for sustainable synthesis of the material.
via Science Daily