When Earth crosses a domain wall, the Global Network of Optical Magnetometers for Exotic Physics (GNOME) could detect the event using four magnetometers (Northern Hemisphere in this sketch) to determine the normal velocity of the wall and predict its passing at other locations. One or more remaining magnetometers would verify the prediction and the measurements.

How do you know if you ran through a wall? Testing the nature of dark energy and dark matter

January 7, 2013 by Paul Preuss

(Phys.org)—Researchers from Canada, California, and Poland have devised a straightforward way to test an intriguing idea about the nature of dark energy and dark matter. A global array of atomic magnetometers – small laboratory devices that can sense minute changes in magnetic fields – could signal when Earth passes through fractures in space known as domain walls. These structures could be the answer to the universe’s darkest mysteries.

Read more: How do you know if you ran through a wall? Testing the nature of dark energy and dark matter — phys.org.

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