The Large Underground Xenon experiment in South Dakota is one of many projects searching for dark matter and coming up empty. (Credit: LUX Collaboration)

Dark matter, the invisible material that so far shows itself only through the pull of its gravity, was first proposed nearly a century ago. It took another half-century to truly ignite the physics community. But at this point, a plethora of highly advanced projects have gone hunting for dark matter and come up empty.

Now scientists arou