The Universe, where space-time becomes discrete

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A theoretical study has analyzed a model that saves special relativity and reconciles it with granularity by introducing small-scale deviations from the principle of locality demonstrating that it can be experimentally tested with great precision.
via Science Daily
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Dark matter does not contain certain axion-like particles

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Researchers are getting closer to corner light dark-matter particle models. Observations can rule out some axion-like particles in the quest for the content of dark matter.
via Science Daily
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Cosmic beacons reveal the Milky Way's ancient core

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Astronomers have discovered that the central 2000 light years within the Milky Way Galaxy hosts an ancient population of stars. These stars are more than 10 billion years old and their orbits in space preserve the early history of the formation of the Milky Way. For the first time the team kinematically disentangled this ancient component from the stellar population that currently dominates the mass of the central Galaxy.
via Science Daily
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Menstruation in spaceflight: Options for astronauts

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A new article explores the options for astronauts who want to prevent menstrual bleeding during their space missions. The article reviews contraceptive devices available including those already used by military and aviation personnel, and calls for more research into the effect of hormone treatments on bone mineral loss in space.
via Science Daily
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Milky Way in Moonlight

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A waning crescent moon, early morning twilight, and Al Hamra's city lights on the horizon can't hide the central Milky Way in this skyscape from planet Earth. Captured in a single exposure, the dreamlike scene looks southward across the region's grand canyon from Jabal Shams (Sun Mountain), near the highest peak in Oman, on the Arabian Peninsula. Mist, moonlight, and shadows still play along the steep canyon walls. Dark rifts along the luminous band of the Milky Way are the galaxy's cosmic dust clouds. Typically hundreds of light-years distant, they obscure starlight along the galactic plane, viewed edge-on from the Solar System's perspective.

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