Overflowing crater lakes carved canyons across Mars

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Today, most of the water on Mars is locked away in frozen ice caps. But billions of years ago it flowed freely across the surface, forming rushing rivers that emptied into craters, forming lakes and seas. New research has found evidence that sometimes the lakes would take on so much water that they overflowed and burst from the sides of their basins, creating catastrophic floods that carved canyons very rapidly, perhaps in a matter of weeks.
via Science Daily
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Auroras unlock the physics of energetic processes in space

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A close study of auroras has revealed new ways of understanding the physics of explosive energy releases in space.
via Science Daily
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Astronomers detect once-in-a-lifetime gamma rays

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It's not every day you get to observe a gamma-ray binary system. In fact, it's a once-in-a-lifetime experience comparable to seeing Halley's Comet or a solar eclipse.
via Science Daily
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Astronomers find possible elusive star behind supernova

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Astronomers may have finally uncovered the long-sought progenitor to a specific type of exploding star by sifting through NASA Hubble Space Telescope archival data. The supernova, called a Type Ic, is thought to detonate after its massive star has shed or been stripped of its outer layers of hydrogen and helium.
via Science Daily
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Universal laws in impact dynamics of dust agglomerates under microgravity conditions

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Scientists have found evidence that when projectiles hit soft clumps of dust or hard clumps of loose glass beads, the scaling laws for energy dissipation and energy transfer are the same in each case. This helps us understand how granular clumps stick together, and how planets are formed.
via Science Daily
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Trans-galactic streamers feeding most luminous galaxy in the universe

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ALMA data show the most luminous galaxy in the universe has been caught in the act of stripping away nearly half the mass from at least three of its smaller neighbors.
via Science Daily
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Earth's magnetic field measured using artificial stars at 90 kilometers altitude

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In 2011, researchers proposed that artificial guide stars could be used to measure the Earth's magnetic field in the mesosphere. An international group of scientists has recently managed to do this with a high degree of precision. The technique may also help to identify magnetic structures in the solid Earth's lithosphere, to monitor space weather, and to measure electrical currents in the part of the atmosphere called ionosphere.
via Science Daily
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