Dark 'Half-Magnets' Could Stream From the Sun

Dark 'Half-Magnets' Could Stream From the Sun
AP Photo/NASA

An invisible substance permeates the universe, altering the paths of stars and galaxies.

This so-called dark matter exerts a gravitational pull, yet never interacts with light. No one knows what it's made of and it has been impossible to detect until now. But a new theory could finally provide a way to test for dark matter.

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