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Giant Bubbles Soar over the Milky Way

Newly discovered lobes stretch tens of thousands of light-years above and below the Milky Way's disk. Where did they come from?

By Douglas Finkbeiner, Meng Su and Dmitry Malyshev

New Physics Questions the Very Nature of Reality

Physicists speak of the world as being made of particles and force fields, but it is not at all clear what particles and force fields actually are in the quantum realm. The world may instead consist of bundles of properties, such as color and shape

By Meinard Kuhlmann

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