Meteorite impacts did not magnetize the Moon’s crust, new simulations reveal

A leading theory as to why regions of the Moon’s crust are magnetized has been debunked by researchers in the US, Germany, and Australia. Through a combination of simulation techniques, a team led by Rona Oran at the Massachusetts Institute of Technology concluded that the lunar surface could not have become magnetized following high-velocity meteorite impacts in the distant past.

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Open-source software detects potential collisions in radiotherapy plans

A team at Massachusetts General Hospital (MGH) has developed RadCollision an open-source collision detection tool designed to aid dosimetrists planning photon or proton beam radiotherapy. When embedded in a treatment planning system (TPS), the modular software platform takes just seconds to automatically calculate whether a gantry head will collide with the patient or treatment couch.

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Rippling graphene harvests thermal energy

The rippling thermal motion of a tiny piece of graphene has been harnessed by a special circuit that delivers low-voltage electrical energy. The system was created by researchers in US and Spain, who say that if it could be duplicated enough times on a chip, it could deliver “clean, limitless, low-voltage power for small devices”.

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Accretion, not colliding spaghetti, flares up as star is devoured by black hole

An extremely bright flare, originating from a star being devoured by a supermassive black hole, has been observed in a galaxy 215 million light-years away making this the nearest tidal disruption event (TDE) ever seen. The event was spotted by an international team of astronomers, headed by Matt Nicholl at the University of Birmingham

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Excitement grows over mysterious signal in dark-matter detector

In June of this year, physicists working on the XENON1T dark-matter detector announced the measurement of a curious signal in their experiment which comprises 2 tonne of ultrapure xenon. The signal had a statistical significance of 3.5σ or less, which is well below the 5σ level that is usually required for a discovery in particle physics. Now, the original preprint has been published in Physical Review D and over in Physical Review Letters, five theoretical papers put forth a wide range of tantalizing explanations for the excess.

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