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    Astronomers Discover More Dark Comets

    December 10, 2024, Categories  Astronomy/Space

    This artist’s concept shows interstellar object 1I/2017 U1 (‘Oumuamua) after its discovery in 2017. While itself not a dark comet, ‘Oumuamua’s motion through the solar system has helped researchers better understand the nature of the 14 dark comets discovered so far.
    European Southern Observatory / M. Kornmesser

    The first dark comet—a celestial object that looks like an asteroid but moves through space like a comet—was reported less than two years ago. Soon after, another six were found...

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    AI infiltrates the rat world: New Robot can Interact Socially with Real Lab Rats

    December 9, 2024, Categories  Physics, Technology/Electronics

    A robot rat that interreacts socially with real lab rats
    Robot–rat social interaction paradigm: a rat-like robot plays the role of a rat conspecific to interact with another rat via multiple interaction patterns.Nature Machine Intelligence (2024). DOI: 10.1038/s42256-024-00939-y

    A team of roboticists at the Beijing Institute of Technology, working with a pair of colleagues from the Technical University of Munich, has created a new kind of rat robot—one that was designed to interact in social ways with real rats.

    In their paper published in the journal Nature Machine Intelligence, the group describes how they used artificial intelligence to train their robot rat to behave like a real rat...

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    Switchbacks: Solar Jets may hold the Key for Understanding Complete Magnetic Field Reversals

    December 9, 2024, Categories  Astronomy/Space

    Switchbacks: Could solar jets hold the key ?
    Simulation domain and magnetic topology. Top left: 3D volume of the domain of the simulation with the root blocks of the grid. Bottom left: A 2D cross section at constant angle of ϕ = 0° of the velocity color at t = 5500 s. This snapshot highlights the spatial distribution of the velocity. The grid block boundaries are delineated by gray lines. Each block contains 8 × 8 × 8 cells. Right: Initial magnetic topological structure. The isosurface of plasma β = 20 (red spheroid) indicates the location of the 3D magnetic null point. Magnetic field lines of distinct connectivity bounding the separatrix surface are represented, either closed (white field lines) or open to the heliosphere (blue field lines). Credit: Astronomy & Astrophysics (2024). DOI: 10...
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    Experiment verifies a Connection between Quantum Theory and Information Theory

    December 9, 2024, Categories  Physics, Technology/Electronics

    A connection between quantum theory and information theory proved
    With the help of a new experiment, researchers at Linköping University, among others, have succeeded in confirming a 10-year-old theoretical study that connects one of the most fundamental aspects of quantum mechanics—the complementarity principle—with information theory. Credit: Magnus Johansson

    Researchers from Linköping University together with colleagues from Poland and Chile have confirmed a theory that proposes a connection between the complementarity principle and entropic uncertainty. Their study is published in the journal Science Advances.

    “Our results have no clear or direct application right now. It’s basic research that lays the foundation for future technologies in quantum information and quantum computers...

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